22m
Think of the "m" as a "monkey".
2 monkeys + 2 monkeys + 9 monkeys + 9 monkeys = 22 monkeys
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m = 20/9 or 2 and 2/9
8M - 4M - 6 - 3 + 5M = 82 - 1 9M - 9 = 64 - 1 9M - 9 = 63 9M - 9 +9 = 63 + 9 9M = 72 9M/9 = 72/9 M = 8
4m + 9 + 5m - 12 = 42 Combining like terms to both sides:9m=42+12-9=>9m=45 divide both side by 9:m=5;
factor it (m + 1)(9m + 2) m= -1 and -2/9
144 9+7 = 16 and 9*16 = 144