1) 7х-(3+2х)=х+9 2)13 - (2х-5)=х-3

Question

1) 7х-(3+2х)=х+9
2)13 - (2х-5)=х-3

Answer 1

1) 7х-3-2х=х+9
5х-3=х+9
5х-х=9+3
4х=12
х=3
2)13-2х+5=х-3
18-2х=х-3
-2х-х=-3-18
-3х=-21
х=7