Question

ПоЖаЛуЙсТа ПоМоГиТе
3(x+5)=x-3
4(x-9)=3(x-8)
7(3-2x)=15(1-x)

Answer 1

1)3(х+5)=х-3
3х+15=х-3
3х-х=-3-15
2х=-18
х=-9

2)4(х-9)=3(х-8)
4х-36=3х-24
4х-3x=36-24
х=12

3)7(3-2х)=15(1-х)
21-14х=15-15х
-14х+15х=15-21
х=-6