Match each equation with the number that makes it true.
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18 + s = 33
27 = 9 · s
40 - s = 23
5 · m = 35
18/s = 3
m/5= 10
m + 14 = 18 - m
m + m + 12 = 22
n + 7 = 18
n - 9 = 22

11
31
7
50
15
17
3
6
5
2