Question

Помогите решить!!! Номер 731

Answer 1

( 3x + 12 - 4x) / 12 = 3

( - x + 12) / 12 = 3/1

- x + 12 = 12 × 3

- x + 12 = 36

- x = 36 - 12

- x = 24

x =- 24

Вроде бы так☄

Answer 2

$\dfrac{x+4}{4}- \dfrac{x}{3} =3\\\\\dfrac{(x+4)*3}{4*3}-\dfrac{4x}{3*4}=\dfrac{36}{12}\quad\quad|:12\\\\3x+12-4x=36\\\\-x=24\\\\x=-24\\\text{Otvet:}\quad -24.$