3(х-7)-(9-2х)=(12-х)-(х-10)

Question

3(х-7)-(9-2х)=(12-х)-(х-10)

Answer 1

3(x-7)-(9-2x)=(12-x)-(x-10)
3x-21-9+2x=12-x-x+10
5x-30=22-2x
5x+2x=22+30
7x=52
x=