Question

Решите уравнение 1) 3x-15=x+3 3) 2(x+3) =x+13

Answer 1

1)3×-15=×+3
3×-×=3+15
2×=18
×=9

3)2 (×+3)=×+13
2×+6=×+13
2×-×=13-6
×=7

Answer 2

3х-15=х+3
3х-х=3+15
2х=18
Х=9

2(х+3)=х+13
2х+6=х+13
2х-х=13-6
х=7