Question

Помогите решить. 1) - 3/5 (10х + 15) - 4х = 21 - х 2) 3 1/2х + 2 (1/4х - 2) = - 5 1/2х + 6

Answer 1

-3*10х/5-3*15/5-4х=21-х
-6х-9-4х=21-х
-9х=30
Х=-10/3=-3 1/3

3 1/2+2/4х-4=-5 1/2х+6
6х=6 1/2
Х=13/12=1 1/12