初一解方程练习题 50道以上 难一些的方程 例如x/0.6-(0.35-0.9x)/0.04=1 这类较难方程

问题描述:

初一解方程练习题 50道以上 难一些的方程
例如x/0.6-(0.35-0.9x)/0.04=1 这类较难方程

7(2x-1)-3(4x-1)=4(3x+2)-1;
(5y+1)+ (1-y)= (9y+1)+ (1-3y);
20%+(1-20%)(320-x)=320×40%
2(x-2)+2=x+1
2(x-2)-3(4x-1)=9(1-x)
x/3 -5 = (5-x)/2
2(x+1) /3=5(x+1) /6 -1
(1/5)x +1 =(2x+1)/4
(5-2)/2 - (4+x)/3 =1
x/3 -1 = (1-x)/2
(x-2)/2 - (3x-2)/4 =-1
11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2
2(x-2)-3(4x-1)=9(1-x)
11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2
2(x-2)+2=x+1
1.7(2x-1)-3(4x-1)=4(3x+2)-1
2.(5y+1)+ (1-y)= (9y+1)+ (1-3y)
3.[ (- 2)-4 ]=x+2
4.20%+(1-20%)(320-x)=320×40%
5.2(x-2)+2=x+1
6.2(x-2)-3(4x-1)=9(1-x)
7.11x+64-2x=100-9x
8.15-(8-5x)=7x+(4-3x)
9.3(x-7)-2[9-4(2-x)]=22
10.3/2[2/3(1/4x-1)-2]-x=2
11.5x+1-2x=3x-2
12.3y-4=2y+1
13.87X*13=5
14.7Z/93=41
15.15X+863-65X=54
16.58Y*55=27489
17.2(x+2)+4=9
18.2(x+4)=10
19.3(x-5)=18
20.4x+8=2(x-1)
21.3(x+3)=9+x
22.6(x/2+1)=12
23.9(x+6)=63
24.2+x=2(x-1/2)
25.8x+3(1-x)=-2
26.7+x-2(x-1)=1
27.x/3 -5 = (5-x)/2
28.2(x+1) /3=5(x+1) /6 -1
29.(1/5)x +1 =(2x+1)/4
30.(5-2)/2 - (4+x)/3 =1
15x-8(5x+1.5)=18*1.25+x
3X+189=521
4Y+119=22
3X*189=5
8Z/6=458
3X+77=59
4Y-6985=81
87X*13=5
7Z/93=41
15X+863-65X=54
58Y*55=27489
1. 2(x-2)-3(4x-1)=9(1-x)
2. 11x+64-2x=100-9x
3. 15-(8-5x)=7x+(4-3x)
4. 3(x-7)-2[9-4(2-x)]=22
5. 3/2[2/3(1/4x-1)-2]-x=2
6. 2(x-2)+2=x+1
7. 0.4(x-0.2)+1.5=0.7x-0.38
8. 30x-10(10-x)=100
9. 4(x+2)=5(x-2)
10. 120-4(x+5)=25
11. 15x+863-65x=54
12. 12.3(x-2)+1=x-(2x-1)
13. 11x+64-2x=100-9x
14. 14.59+x-25.31=0
15. x-48.32+78.51=80
16. 820-16x=45.5×8
17. (x-6)×7=2x
18. 3x+x=18
19. 0.8+3.2=7.2
20. 12.5-3x=6.5
21. 1.2(x-0.64)=0.54
22. x+12.5=3.5x
23. 8x-22.8=1.2
24. 1\ 50x+10=60
25. 2\ 60x-30=20
26. 3\ 3^20x+50=110
27. 4\ 2x=5x-3
28. 5\ 90=10+x
29. 6\ 90+20x=30
30. 7\ 691+3x=700
1 2x-10.3x=15
2 0.52x-(1-0.52)x=80
3 x/2+3x/2=7
4 3x+7=32-2x
5 3x+5(138-x)=540
6 3x-7(x-1)=3-2(x+3)
7 18x+3x-3=18-2(2x-1)
8 3(20-y)=6y-4(y-11)
9 -(x/4-1)=5
10 3[4(5y-1)-8]=6

  14x-7-12x+3=12x+8-1
  2x-4=12x+7
  -10x=11
  x=-11/10(负十分之十一)

  (5y+1)+(1-y)=(9y+1)+(1-3y)
  5y+2-y=9y+2-3y
  5y-9y+2-2-y+3y=0
  -4y+2y=0
  -2y=0
  y=0

  20%+80%(320-x)=320×40%
  20%+320(80%-40%)=80%x
  1+320×2=4x
  x=641/4

  2(x-2)+2=x+1
  4x-4+2=x+1
  4x-3=x
  x=1
  (1)2—(1—y)=—2
  2-1+y=--2
  y=-2-2+1=-3

  (2)5—(x—1)=3—3x
  5-x+1=3-3x
  2x=3-1-5
  2x=-3
  x=-1.5

  (3)3—2(2x+1)=2(x—3)
  3-4x-2=2x-6
  6x=3-2+6
  6x=7
  x=7/6

  (4)4x—3(20—x)=6x—7(9—x)
  4x-60+3x=6x-63+7x
  7x-60=13x-63
  6x=3
  x=0.5

  (5)12(2—3x)=4x+4
  24-36x=4x+4
  40x=20
  x=0.5

  (6)2(200—15x)=70+25x
  400-30x=70+25x
  55x=330
  x=6

  (7)4x—3(20—x)+4=0
  4x-60+3x+4=0
  7x=60-4=56
  x=8

  (8)1—3(8—x)=—2(15—2x)
  1-24+3x=-30+4x
  x=1-24+30
  x=7
  (9)2-(1-y)=-2
  2-1+y=-2
  1+y=-2
  y=-3

  (10)5-(x-1)=3-3x
  5-x+1=3-3x
  6-x=3-3x
  -x+3x=3-6
  x=-1.5x=38/3(1) 3X-(1/2+1/4)=7/12
  3X=7/12+3/4
  3X=4/3
  X=4/9

  (2) 6.6-5X=3/4-4X
  6.6-0.75=-4X+5X
  X=5.85

  (3) 1.1X+2.2=5.5-3.3X
  1.1X+3.3X=5.5-2.2
  4.4X=3.3
  X=3/4=4/3

  (4)3x-3=1
  x=4/3
  (5)5x-3x=4
  x=2
  (6)3x+7=28
  x=7
  (7)3x-7=26
  x=11
  (8)9x-x=16
  x=2

  (9)24x+x=50
  x=2
  (10)3x-8=30


x/0.6-(0.35-0.9x)/0.04=1
0.04x-0.0012+0.54x=1
0.58x-0.0021=1
0.58x=1.0021
x约得于1.73