Решить уравнения: 2x+7=5x+13; 3x-23=19-4x; 1,3x+4,8=2,9x-7,2; 4/7x+1 3/7=6/7x-5 5/7*7; 2(x-3)-4(x+1)=5x-38

2x+7=5x+13 2х-5х=13-7 -3х=6 х=6/(-3) х=-2   3x-23=19-4x 3х+4х=19+23 7х=42 х=42/7 х=6   1,3x+4,8=2,9x-7,2 1,3х-2,9х=-7,2-4,8 -1,6х=-12 х=-12/(-1,6) х=7,5   4/7x+1 3/7=6/7x-5 5/7*7 4/7х+1 3/7=6/7х-40 4/7х-6/7х=-40-1 3/7 -2/7х=-290/7 х=-290/7:(-2/7) х=145   2(x-3)-4(x+1)=5x-38 2х-6-4х-4=5х-38 -2х-10=5х-38 -2х-5х=-38+10 -7х=-28 х=-28/(-7) х=4