40道分式方程計算題附答案40道分式方程計算題附答案

2021-03-05 09:21:02 字數 9116 閱讀 1553

1樓:愛薄荷的吃貨

1. 3/2x=-2

3=-4x

x=-3/4

2. x/(x-1)+2/(x+1)=1

x(x+1)+2(x-1)=(x-1)(x+1)x^2+x+2x-2=x^2-1

3x=1

x=1/3

3. 1/(x+1)-x^2/(x^2+3x+2)=-11/(x+1)-x^2/(x+1)(x+2)=-1(x+2)/(x+1)(x+2)-x^2(x+1)(x+2)=-1x+2-x^2=-(x+1)(x+2)

x^2-x-2=x^2+3x+2

4x=-4

x=-1

x/(2x-1)=(-2x-1)/(1-2x)x=2x+1

x=-1

(3) (11-2x)/(4-x)=(1-x)/(x-4)11-2x=x-1

3x=12

x=4∵當x=4時,原方程無意義,

∴原方程無解

7/(x2+x)+3/(x2-x)=6/(x2-1)解 方程兩邊同乘以最簡公分母x(x+1)(x-1),得7(x-1)+3(x+1)=6x

去括號,得 7x-7+3x+3=6x

移項,得7x-6x+3x=7-3

合併同類項,得4x=4

係數化1,得x=1

3/x-6/(1-x)-(x+5)/x(1-x)=0解 方程兩邊同乘以最簡公分母x(1-x),得3(1-x)-6x-(x+5)=0

去括號,得 3-3x-6x-x-5=0

合併同類項,得-10x=2

係數化1,得x=-1/5

(5x-4)/(2x-4)=(2x+5)/(3x-6)-1/2解 方程兩邊同乘以最簡公分母6(x-2),得3(5x-4)=2(2x+5)-3(x-2)去括號,得 15x-12=4x+10-3x+6移項,得15x-4x+3x=10+6+12合併同類項,得14x=28

係數化1,得x=2

經檢驗,x=2是增根,捨去,所以原方程無解x2-4x/(x2-1)+1=2x/(x+1)解 方程兩邊同乘以最簡公分母(x2-1),得x2-4x+x2-1=2x(x-1)

即 2x2-4x-1=2x2-2x

移項,得2x2-4x-2x2+2x=1

合併同類項,得-2x=1

x=-1/2

1/(x+3)+1/(6-2x)=(3x-15)/(2x2-18)解 方程兩邊同乘以最簡公分母2(x+3)(x-3),得2(x-3)-(x+3)=3x-15

去括號,得2x-6-x-3=3x-15

移項,得2x-x-3x=-15+6+3

合併同類項,得-2x=-6

x=3解關於x的方程:

x/(x-a)=1-[a/(x+b)] (a≠0)x/(x-a)+[a/(x+b)]=1

通分,(x2+bx+ax-a2)/[(x-a)(x+b)]=1方程兩邊同乘以最簡公分母(x-a)(x+b),得(x2+bx+ax-a2)=(x-a)(x+b)去括號,得x2+bx+ax-a2=x2+bx-ax-ab移項,得x2+bx+ax-x2-bx+ax=-ab+a2合併同類項,得2ax=a2-ab

x=(a-b)/2

2樓:雄鷹

50道分式方程及答案

分式方程計算題100道 及答案

3樓:這無奈的局面

2x+17=35

3x-64=11

12+8x=52

0.8x-4.2=2.2

2x+5=10

3x-15=75

4x+4o=320

3x+77=122

5x-1.6=0.6

6x-4=20

10x-0.6=2.4

500-12x=140

1) 66x+17y=3967

25x+y=1200

答案:x=48 y=47

(2) 18x+23y=2303

74x-y=1998

答案:x=27 y=79

(3) 44x+90y=7796

44x+y=3476

答案:x=79 y=48

(4) 76x-66y=4082

30x-y=2940

答案:x=98 y=51

(5) 67x+54y=8546

71x-y=5680

答案:x=80 y=59

(6) 42x-95y=-1410

21x-y=1575

答案:x=75 y=48

(7) 47x-40y=853

34x-y=2006

答案:x=59 y=48

(8) 19x-32y=-1786

75x+y=4950

答案:x=66 y=95

(9) 97x+24y=7202

58x-y=2900

答案:x=50 y=98

(10) 42x+85y=6362

63x-y=1638

答案:x=26 y=62

(11) 85x-92y=-2518

27x-y=486

答案:x=18 y=44

(12) 79x+40y=2419

56x-y=1176

答案:x=21 y=19

(13) 80x-87y=2156

22x-y=880

答案:x=40 y=12

(14) 32x+62y=5134

57x+y=2850

答案:x=50 y=57

(15) 83x-49y=82

59x+y=2183

答案:x=37 y=61

(16) 91x+70y=5845

95x-y=4275

答案:x=45 y=25

(17) 29x+44y=5281

88x-y=3608

答案:x=41 y=93

(18) 25x-95y=-4355

40x-y=2000

答案:x=50 y=59

(19) 54x+68y=3284

78x+y=1404

答案:x=18 y=34

(20) 70x+13y=3520

52x+y=2132

答案:x=41 y=50

(21) 48x-54y=-3186

24x+y=1080

答案:x=45 y=99

(22) 36x+77y=7619

47x-y=799

答案:x=17 y=91

(23) 13x-42y=-2717

31x-y=1333

答案:x=43 y=78

(24) 28x+28y=3332

52x-y=4628

答案:x=89 y=30

(25) 62x-98y=-2564

46x-y=2024

答案:x=44 y=54

(26) 79x-76y=-4388

26x-y=832

答案:x=32 y=91

(27) 63x-40y=-821

42x-y=546

答案:x=13 y=41

(28) 69x-96y=-1209

42x+y=3822

答案:x=91 y=78

(29) 85x+67y=7338

11x+y=308

答案:x=28 y=74

(30) 78x+74y=12928

14x+y=1218

答案:x=87 y=83

(31) 39x+42y=5331

59x-y=5841

答案:x=99 y=35

(32) 29x+18y=1916

58x+y=2320

答案:x=40 y=42

(33) 40x+31y=6043

45x-y=3555

答案:x=79 y=93

(34) 47x+50y=8598

45x+y=3780

答案:x=84 y=93

(35) 45x-30y=-1455

29x-y=725

答案:x=25 y=86

(36) 11x-43y=-1361

47x+y=799

答案:x=17 y=36

(37) 33x+59y=3254

94x+y=1034

答案:x=11 y=49

(38) 89x-74y=-2735

68x+y=1020

答案:x=15 y=55

(39) 94x+71y=7517

78x+y=3822

答案:x=49 y=41

(40) 28x-62y=-4934

46x+y=552

答案:x=12 y=85

(41) 75x+43y=8472

17x-y=1394

答案:x=82 y=54

(42) 41x-38y=-1180

29x+y=1450

答案:x=50 y=85

(43) 22x-59y=824

63x+y=4725

答案:x=75 y=14

(44) 95x-56y=-401

90x+y=1530

答案:x=17 y=36

(45) 93x-52y=-852

29x+y=464

答案:x=16 y=45

(46) 93x+12y=8823

54x+y=4914

答案:x=91 y=30

(47) 21x-63y=84

20x+y=1880

答案:x=94 y=30

(48) 48x+93y=9756

38x-y=950

答案:x=25 y=92

(49) 99x-67y=4011

75x-y=5475

答案:x=73 y=48

(50) 83x+64y=9291

90x-y=3690

答案:x=41 y=92

3x+18=52 x=34/3

4y+11=22 y=11/4

3x*9=5 x=5/27

8z/6=48 z=36

3x+7=59 x=52/3

4y-69=81 y=75/4

8x*6=5 x=5/48

7z/9=4 y=63/7

15x+8-5x=54 x=4.6

5y*5=27 y=27/40

8x+2=10 x=1

x*8=88 x=11

y-90=1 y=91

2x-98=2 x=50

6x*6=12 x=1/3

5-6=5x x=-1/5

6*x=42 x=7

55-y=33 y=22

11*3x=60 x=20/11

8-y=2 y=-6

1.x+2=3

2.x+32=33

3.x+6=18

4.4+x=47

5.19-x=8

6.98-x=13

7.66-x=10

8.5x=10

9.3x=27

10.7x=7

11.8x=8

12.9x=9

13.10x=100

14.66x=660

15.7x=49

16.2x=4

17.3x=9

18.4x=16

19.5x=25

20.6x=36

21.8x=64

22.9x=81

23.10x=100

24.11x=121

25.12x=144

26.13x=169

27.14x=196

28.15x=225

29.16x=256

30.17x=289

31.18x=324

32.19x=361

33.20x=400

31.21x=441

32.22x=484

33.111x=12321

34.1111x=1234321

35.11111x=123454321

36.111111x=12345654321

37.46/x=23

38.64/x=8

39.99/x=11

40.1235467564x=0

41.2x+1= -2+x

42.4x-3(20-x)=3

43..-2(x-1)=4

44.3x+189=521

45.4y+119=22 5

46.3x+77=59

47.4y-6985=81

48.x=0.1

49.5x=55.5

50.y=50-85

(-8)-(-1) =-7

45+(-30) =15

-1.5-(-11.5) =10

-0.25-(-0.5) =0.25

15-【1-(-20-4)】 =-10

-40-28-(-19)+(-24) =-73

22.54+(-4.4)+(-12.54)+4.4 =10

(2/3-1/2)-(1/3-5/6)=2/3

2.4-(-3/5)+(-3.1)+4/5 =0.7

(-6/13)+(-7/13)-(-2) =1

3/4-(-11/6)+(-7/3) =1/4

11+(-22)-3×(-11) =22

(-0.1)÷0.5×(-100) =20

(-2)的3次方-9 =-17

23÷[-9-(-4)] =-23/5

(3/4-7/8)÷(-7/8) =1/7

(-60)×(3/4+5/6)=-95

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)

5+21*8/2-6-59

68/21-8-11*8+61

-2/9-7/9-56

4.6-(-3/4+1.6-4-3/4)

1/2+3+5/6-7/12

[2/3-4-1/4*(-0.4)]/1/3+2

22+(-4)+(-2)+4*3

-2*8-8*1/2+8/1/8

(2/3+1/2)/(-1/12)*(-12)

(-28)/(-6+4)+(-1)

2/(-2)+0/7-(-8)*(-2)

(1/4-5/6+1/3+2/3)/1/2

18-6/(-3)*(-2)

(5+3/8*8/30/(-2)-3

(-84)/2*(-3)/(-6)

1/2*(-4/15)/2/3

-1+2-3+4-5+6-7

-50-28+(-24)-(-22)

-19.8-(-20.3)-(+20.2)-10.8

0.25- +(-1 )-(+3 )

-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕

0÷(-4)-42-(-8)÷(-1)3

-32-(-3) 2-(-3)3+(-1)6

3×(-2)2+(-2×3)2+(-2+3)2

(-12)÷4×(-6)÷2

(-12)÷4×(-6)×2

75÷〔138÷(100-54)〕

85×(95-1440÷24)

80400-(4300+870÷15)

240×78÷(154-115)

1437×27+27×563

〔75-(12+18)〕÷15

2160÷〔(83-79)×18〕

280+840÷24×5

325÷13×(266-250)

85×(95-1440÷24)

58870÷(105+20×2)

1437×27+27×563

81432÷(13×52+78)

[37.85-(7.85+6.4)] ×30

156×[(17.7-7.2)÷3]

(947-599)+76×64

36×(913-276÷23)

-(3.4 1.25×2.4)

0.8×〔15.5-(3.21 5.79)〕

(31.8 3.2×4)÷5

194-64.8÷1.8×0.9 36.72÷4.25×9.9

3.416÷(0.016×35)

0.8×[(10-6.76)÷1.2]

(136+64)×(65-345÷23)

(6.8-6.8×0.55)÷8.5

0.12× 4.8÷0.12×4.8

(58+37)÷(64-9×5)

812-700÷(9+31×11)

(3.2×1.5+2.5)÷1.6

85+14×(14+208÷26)

120-36×4÷18+35

(284+16)×(512-8208÷18)

9.72×1.6-18.305÷7

4/7÷[1/3×(3/5-3/10)]

(4/5+1/4)÷7/3+7/10

12.78-0÷( 13.4+156.6 )

37.812-700÷(9+31×11)

(136+64)×(65-345÷23)

3.2×(1.5+2.5)÷1.6

85+14×(14+208÷26)

(58+37)÷(64-9×5)

(6.8-6.8×0.55)÷8.5

(284+16)×(512-8208÷18)

0.12× 4.8÷0.12×4.8

(3.2×1.5+2.5)÷1.6

120-36×4÷18+35

10.15-10.75×0.4-5.7

5.8×(3.87-0.13)

+4.2×3.74 347+45×2-4160÷52

32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)

[(7.1-5.6)×0.9-1.15] ÷2.5 (3.2×1.5+2.5)÷1.6

5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷(12-7.2)-6

3.2×6+(1.5+2.5)÷1.6 (3.2×1.5+2.5)÷1.6

5.8×(3.87-0.13)+4.2×3.74

33.02-(148.4-90.85)÷2.5

自己看吧孩子,絕對可以幫到你

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