If -3m+5=-22, then you do this math: -22-5= -3m. -22-5=-27, so if you take the negative signs away from -27 and -3m, divide 27 by 3 to get 9, therefore m=9.
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M = 22
3m + 15 = 45 3m = 30 m = 10
22-3m=7 [Subtract 22 from each side]-3m=-15 [Divide both numbers by -3]m=5
If 3m - 7 = 8, then m = 5
270