Question

Решите уравнения
5x+(3x-7)=9
3y-(5-y)=11
(7a+1)-(6a+3)=5

Answer 1

5х+(3х-7)=9
5х+3х-7=9
8х=9+7
8х=16
х=16:8
х=2
3y-(5-y)=11
3y-5+y=11
4y=11+5
4y=16
y=16:4
y=4
(7a+1)-(6a+3)=5
7a+1-6a-3=5
a=5-1+3
a=7
a=7:1
a=7