3(-2x-5)+2x=9怎么解方程?

问题描述:

3(-2x-5)+2x=9怎么解方程?

﹣6x-15+2x=9
﹣4x=9+15
x=﹣6.

3(-2x-5)+2x=9
左边去括号,得
-6x-15+2x=9
即 -4x=24
即 x=-6

3(-2x-5)+2x=9那么
-6x-15+2x=9那么
-4x-15=9那么
-4x=24得
x=-6

-6x-15+2x=9
-4x=24
x=-6

3(-2x-5)+2x=9
-6x-15+2x=9
-4x=24
x=-6

3(-2x-5)+2x=9
-6x+15+2x=9
-4x=-6
x=3/2