72
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18 + 36 + 45 + 9 + 9 + 54 + 27 + 72 + 81 = 351
1/9 + 5/6 = 6/54 + 45/54 = 51/54 = 17/18 <-------------------------
6x + 18 = 54 6x = 54 - 18 6x = 36 x = 36 ÷6 x = 6
18 + 32 = 50 50 +2 = 52 52 + 2 = 54
18(2 + 3)