Question

решите уравнение:
3(5х-4)-8х=4х+9

Answer 1

15х - 12- 8х= 4х+9 
15х-8х -4х= 9+ 12
3х= 21
х=7

Answer 2

спасибка

Answer 3

3×5х-3×4-8х=4х+9
15х-12-8х=4х+9
15х-8х-4х=12+9
3х=21
х=21÷3
х=7