Question

12х-х=55 сравни уравнения 2(х+3)=16 5(х+3)+7=3(х+12)

Answer 1

12х-х=55
11х=55
х=5

2(х+3)=16
2х+6=16
2х=10
х=5

5(х+3)+7=3(х+12)
5х+15+7-3х-36=0
2х-14=0
х=7