Question

Решить уравнение (57-3x)×4=78-2x

Answer 1

(57-3x)×4=78-2x

228-12х=78-2х

-12х+2х=78-228

-10х=-150

х=150:10

х=15

Отвнт:х=15

Answer 2

(57-3x)×4=78-2x
(57-3x)×4-78+2x=0
228-12x-78+2x=0
150-10x=0
-10x=-150
x=15