help me!!~

2(x-9)-7(2x+3)=4(x-1 )-15(x+1)
2x – 18 – 14x – 21 = 4x – 4 – 15x – 15
-12x – 39 = -11x – 19
x = -20

7(2x-3)-3(4x+1)=4-10 (2-x)
14x – 21 – 12x – 3 = 4 – 20 + 10x
2x – 24 = 10x – 16
8x = -8
x = -1

6(x-2)+3(x+8)=4(x+3)
6x – 12 + 3x + 24 = 4x + 12
9x + 12 = 4x + 12
5x = 0
x = 0

2x-18-14x+21=4x-4-15x-15
13x=-22.
x=22over13

14x-21-12x-3=4-20-10x
12x=17
x=17over12
6x-12+3x+24=4x+12
5x=0
x=0
（因爲我台電腦不可以打分數）
如果是功課的應該自己做

2(x-9)-7(2x+3)=4(x-1)-15(x+1)
2x-18-14x-21=4x-4-15x-15
-12x-29=-11x-19
-x=10
x=-10


7(2x-3)-3(4x+1)=4-10(2-x)
14x-21-12x-3=4-20+10x
2x-24=10x-16
-8=8x
x=-1


6(x-2)+3(x+8)=4(x+3)
6x-12+3x+24=4x+12
9x+12=4x+12
9x=4x
x=0

2006-11-01 20:27:21 補充：
The first one2(x-9)-7(2x+3)=4(x-1)-15(x+1)2x-18-14x-21=4x-4-15x-15-12x-39=-11x-19-x=20x=-20