Решите примеры 7х-(3+2х)=х+9 13-(2х-5)=х-3 3х-(10-9х)=22х 26-(17-2х)=5х

Question

Решите примеры
7х-(3+2х)=х+9
13-(2х-5)=х-3
3х-(10-9х)=22х
26-(17-2х)=5х

Answer 1

7х-(3+2х)=х+9; 7х-3-2х-х=9; 7х-2х-х=9+3; 4х=12; х=3;
13+5+3=2х+х; 3х=21; х=7
3х+9х-10=22х; 10х=-10; х=-1
26-17+2х=5х; 3х=9; х=3.