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

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