Question

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

Answer 1

5-2x+11-7(x+2)=0
5-2х+11-7х-14=0
2-9х=0
9х=-2
х= - 29
3x+5+(x+5)=(1-x)+4
3х+5+х+5-1+х-4=0
5х+5=0
5х= -5
х= -1