5m2 - 17m + 12 = 0
∴ 5m2 - 5m - 12m + 12 = 0
∴ 5m(m - 1) - 12(m - 1) = 0
∴ (5m - 12)(m - 1) = 0
∴ m ∈ {1, 12/5}
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This could be intended as a trick question; the answer is 0. 0 + 6 = 12 - 6
12 plus 0 is 12
If: x+3+6x+9 = 0 then 7x+12 = 0 So: 7x = -12 and x = -12/7
There are infinitely many possible answers. 1.5 + 2.5 + 18 = 10 + 0 + 12
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