x - 5 = 25
z : 3 = 7
2z -5=25
12 + x =25
3z=24
4z=40
(x : 4)+3=2
3x+2 = 29
2x=24
X=13
x=12
x=9
z=21
z=8
x=30
z=15
z=10
x=-4
