-6x = -18
x=-18/-6
x=3
5x+3=28
5x=28-3
5x=25
x=25/5
x=5
7y+5=26
7y=26-5
21/7=3
y=3
9z-5=31
9z=31+5
36/9=4
z=4
3a-2=-17
3a=17+2
15/3=5
a=3
4b+13=-13
4b=-13-13
4b=-26
b=-26/4
b=-13/2
34-3x=-20
-3x=-20-34
-3x=-54
x-18
7x-8=41
7x=41+8
7x=49
x=49/7
x=7
28+3x=7x
28=7x-3x
28=4x
x=28/4
x=7
18+5x=8x
18=5x-8x
18=3x
x=18/3
x=6
42-5y=2y
42=5y+2y
42=7y
y=42/7
y=6
3z+18=5z
18=3z-5z
18=2z
z=18/2
z=9
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