Question

Помогите решить 12-7x=47-12x

Answer 1

12x-7x=47-12
5x=35
x=35/5
x=7

Answer 2

12-7х=47-12х
12х-7х=47-12
5х=35
х=35:5
х=7
12-7*7=47-12*7
12-49=47-84
-37=-37