Simple Equations

Here are some mathematical equations for you to solve.
Can you figure out the answers?

2s + 4 = 20
s =
6e + 6 = 30
e =
9h + 9 = 63
h =
9c + 8 = 17
c =
3q + 1 = 28
q =
6z + 10 = 28
z =
6u + 7 = 13
u =
3u + 2 = 26
u =
9h - 5 = 13
h =
10h - 5 = 45
h =

 

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