Here are some mathematical equations for you to solve. Can you figure out the answers?
10r + 8 = 48
7x + 4 = 18
3d + 9 = 18
7h - 1 = 20
6l - 6 = 24
6d - 5 = 19
9l - 1 = 80
10u - 10 = 20
2h + 1 = 15
8r + 8 = 40
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