1) 5(13-2х)=-19-3х решите уравнение 2) 1479:(7х-5)=29
1. 65-10x = -19-3x 65+19=-3x+10x 84=7x x=12 2. 1479=29(7x-5) | ОДЗ: x не равен 5/7 51 = 7x-5 56 = 7x x = 8
1) 5(13-2х)=-19-3х 65-10х=-19-3х -10х+3х=-19-65 -7х=-84 х=-84:(-7) х=12 2) 1479:(7х-5)=29 7х-5=1479:29 7х-5=51 7х=51+5 7х=56 х=56:7 х=8