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2014-10-09T00:10:17+03:00
3+x=28/4
x=7-3
x=4

 5(x+2)=32
5x+10=32
5x=32-10
5x=22
x=22/5

 2a-3=17
2a=17+3
a=20/2
a=10

120/z=12
z=120/12
z=10

8y+6=42-4
8y+6=38
8y=38-6
8y=32
y=32/8
y=4

20+3t=100/2

20+3t=50
3t=50-20
3t=30
t=30/3
t=10