3x - 15 = x +3 3x - 15 = x +3

Question

3x - 15 = x +3
3x - 15 = x +3

Answer 1

3х-х=3+15
2х=18
х=9
Ответ: х=9

Answer 2

3х-х=15+3
2х=18
х=18:2
х=9
3*9-15=9+3(12=12)