1. РЕШИ УРАВНЕНИЯ
2х+7=5х+13
3х-23=19-4х
1,3х+4,8=2,9х-7,2
4/7х + 1 целая 3/7 = 6/7х - 5 целых 5/7
2*(х-3)-4*(х-1)=5х-38
4*(3-х)-11=7*(2х-5)
0,9*(4у-2)=0,5*(3у-4)+4,4

2х+7=5х+13 2х-5х=13-7-3х=6х=-2 3х-23=19-4х3х+4х=19+237х=42х=6  1,3х+4,8=2,9х-7,21,3х-2,9х=-7,2-4,8-1,6х=-12х=7,5  4/7х + 1  3/7 = 6/7х - 5 5/7 4/7х-6/7х=-5 5/7-1 3/7-2/7 х=-6 8/7-2/7 х=-7 1/7х=50/7:2/7х=50/7·7/2х=25 2*(х-3)-4*(х-1)=5х-382х-6-4х+4=5х-38-7х=-38+2-7х=-36х=36/7х=5 1/7 4*(3-х)-11=7*(2х-5) 12-4х-11=14х-35-4х-14х=-35-1-18х=-36х=20,9*(4у-2)=0,5*(3у-4)+4,4 3,6у-1,8=1,5у-2+4,43,6у-1,5у=2,4+1,82,1у=4,2у=2