Question

求解这六道解方程题

5(x-4)=8 4-3(x-2)=12 4x-2(3-6x)=40 -60(x+2)=120 5(x-1)-2=10 -3(x-2)=-18

一定要用上去括号 移向 变号之类的

Answer 1

5(x-4)=8
5x-20=8
5x=8+20
5x=28
x=28÷5
x=5.6

4-3(x-2)=12
4-3x+6=12
10-3x=12
3x=10-12
3x=-2
x=-2/3

4x-2(3-6x)=40
4x-6+12x=40
16x=40+6
16x=46
x=2.875

-60(x+2)=120
-60x-120=120
-60x=120+120
-60x=240
x=-4

5(x-1)-2=10
5x-5-2=10
5x-7=10
5x=10+7
5x=17
x=17/5
-
3(x-2)=-18

3x-6=-18
3x=-18+6
3x=-12
x=-4

Answer 2

1、5(x-4)=8
5*x-20=8
x=(20+8)/5=28/5
2、4-3*x+6=12
-3*x=12-4-6
x=-2/3
3、4x-6+12x=40
x=46/16=23/8
4、x+2=-120/60
x+2=-2
x=-4
5 x-1=12/5
x=17/5
6 x-2=6
x=8

Answer 3

5x-20=8 4-3x+6=12 4x-6+12x=40 -60x-120=120 5x-5-2=10 -3x+6=-18
5x=28 10-3x=12 16x=46 -60x=240 5x=17 -3x=-24
x=28/5 -3x=2 x=23/8 x=-40 x=17/5 x=8
x=-2/3