解一元一次方程题11.y-2-18y/6=y/9+212.x+2/4-2x-3/6=113.x-1/3-x+2/6=4-x/214.3/2[4(x-1/3)-2/3]=2x15.1/2[x-1/2(x-1)]=2/3(x-1)16.1/4(1-3/2)x-1/3(2-x/4)=217.4/3[3/2(x/2-1)-3]-2x=318.3Ix-1I+3=919.7x-12(5/3x-1/2)=8-2/3(6x-9)20.x-1/2[x-1/3(x-6)]

Question

解一元一次方程题
11.y- 2-18y/6=y/9+2
12.x+2/4- 2x-3/6=1
13.x-1/3- x+2/6= 4-x/2
14.3/2[4(x-1/3)-2/3]=2x
15.1/2[x-1/2(x-1)]=2/3(x-1)
16.1/4(1-3/2)x-1/3(2-x/4)=2
17.4/3[3/2(x/2-1)-3]-2x=3
18.3 Ix-1I +3=9
19.7x-12(5/3x-1/2)=8-2/3(6x-9)
20.x-1/2[x-1/3(x-6)]=1/6(x-6)+3
21.3/2[2/3(1/4x+1)+2]-5/2=2/3
2楼你这样说就不对了，如果我会做这些题我还用得着在这里浪费时间吗？
不然明天我就遭殃了！
8楼，你胡说，

Answer 1

11. y- (2-18y)/6=y/9+2
两边乘18
18y-6-54y=2y+36
38y=-42
y=-21/19
12. (x+2)/4- (2x-3)/6=1
两边乘12
3x+6-4x+6=12
-x+12=12
x=0
13. (x-1)/3- (x+2)/6= (4-x)/2
两边乘12
4x-4-2x-4=24-6x
2x-8=24-6x
8x=32
x=4
14. 3/2[4(x-1/3)-2/3]=2x
3/2(4x-4/3-2/3)=2x
3/2(4x-2)=2x
6x-3=2x
4x=3
x=3/4
15. 1/2[x-1/2(x-1)]=2/3(x-1)
1/2(x-1/2x+1/2)=2/3(x-1)
1/2(1/2x+1/2)=2/3(x-1)
两边乘12
3x+3=8x-8
5x=11
x=11/5
16. 1/4(1-3/2)x-1/3(2-x)/4=2
1/4-3/8x-1/6+1/12x=2
1/12-7/24x=2
7/24x=-23/12
x=-46/7
17. 4/3[3/2(x/2-1)-3]-2x=3
2(x/2-1)-4-2x=3
x-2-4-2x=3
-x-6=3
x=-9
18. 3 |x-1| +3=9
3|x-1|=6
|x-1|=2
x-1=2或-2
x=3或x=-1
19. 7x-12(5/3x-1/2)=8-2/3(6x-9)
7x-20x+6=8-4x+6
-13x+6=-4x+14
9x=-8
x=-8/9
20. x-1/2[x-1/3(x-6)]=1/6(x-6)+3
x-1/2(x-1/3x+2)=1/6x-1+3
x-1/2(2/3x+2)=1/6x+2
x-1/3x-1=1/6x+2
2/3x-1/6x=2+1
1/2x=3
x=6
21. 3/2[2/3(1/4x+1)+2]-5/2=2/3
(1/4x+1)+3-5/2=2/3
1/4x+1+1/2=2/3
1/4x=2/3-1-1/2=-5/6
x=-10/3