Решение уравнения 3(5x-4)-8x=4x=9

Question

Решение уравнения 3(5x-4)-8x=4x=9

Comments

может - 4х???

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2 раза "="?

Answer 1

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

Answer 2

3 (5х - 4) - 8х - 4х = 9
15х - 12 - 8х - 4х = 9
15х - 8х - 4х = 9 + 12
3х = 21
х = 21 : 3
х = 7