Решите уравнение: 1) 3(х+5)=7-5х 2) 4(х-9)=3(х-8) 3) 7(3-2х)=15(1-х) 4) 13-(2х-5)=х-3 5) 26-(17-2х)=5х
1) 3х+15=7-5х 3х+5х = 7-15 8х=-8 х=-1 2)4х-36=3х-24 4х-3х=36-24 х=12 3) 21-14х=15-15х 21-15=14х-15х х=-6 4) 13-2х+5 = х-3 13+5+3 = 2х+х 21=3х х=21:3 х=7 5) 26-17+2х=5х 9 = 5х-2х 3х=9 х=3