Решите уравнения: 5-2x+11-7(x+2), 3x+5+(x+5)=(1-x)+4, 3x+5+2(x+5)=3(1-x)+4, -x-2+3(x-3)=3(4-x)-3
5-2x+11-7(x+2)=0 5-2х+11-7х-14=0 2-9х=0 9х=-2 х= - 2\9 3x+5+(x+5)=(1-x)+4 3х+5+х+5-1+х-4=0 5х+5=0 5х= -5 х= -1