Question

уровнения -5x+3(3+2x)=7 30-x=3(20-x)

Answer 1

-5х+3(3+2х)=7
-5х+9+6х-7=0
х+2=0
х=-2

30-х=3(20-х)
30-х=60-3х
30-х-60+3х=0
-30+2х=0
2х=30
х=15

Answer 2

30-х=60-3х;
2х=30;
Х=15