x+5=15
-5+x=4
4x=8
3x+3=6
5x+20=40
-6x=12
-x=1
-3x+6=12
-17+x=17
2(x+2)=30
3(x-1)=42
2(5x-7)=16
3(9x-1)=24
5x-3+2x+7=53
-5(3+2x)=-85
5x+3x-4x=28
6(2x-4)+5=
4(x+6)+3(1+x)=76
5x+10x+3+12=0
x+3=3