Question

решите уравнение 9*(х-5)+4*(6-х)=3+3*(х+20)-2х

Answer 1

9*(х-5)+4*(6-Х)=3+3*(Х+20)-2х
9*х-45+24-4х=3+3х+60-2х
5х-21=Х+63
5х-Х=63+21
4х=84
Х=84:4
Х=21