Here are some mathematical equations for you to solve. Can you figure out the answers?
3z - 6 = 12
2s - 2 = 10
2k + 5 = 7
9k + 4 = 31
6y + 1 = 7
8g - 2 = 70
8i + 5 = 61
7k - 9 = 40
10z - 10 = 60
6h + 9 = 33
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