Question

Реши уравнения 12 х -х=56 2(х+3)=16 5(х+3)+7=3(х+12)

Answer 1

1)12х-х=56
11х=56
х=5,09
2)2(х+3)=16
2х+6=16
2х=10
х=5
3)5(х+3)+7=3(х+12)
5х+15+7=3х+36
5х-3х=36-22
2х=14
х=7