Question

Решите уравнения пожалуйста

Answer 1

7х+7=9х+9
7х-9х=9-7
-2х=2
х=-1
8х-23=19-2х
8х+2х=19+23
10х=42
х=4,2
5/8х+3/4=3/8х-7 1/4
5/8х-3/8х=-7 1/4-3/4
2/8х=-7 4/4
1/4х=-8
х=-8:1/4
х=-32
2(х-3)-4(х+1)=5х-38
2х-6-4х-4=5х-38
2х-4х-5х=-38+6+4
-7х=-28
х=4