Solve for m
m=1
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8m-12=-4
Swap sides so that all variable terms are on the left hand side.
8m=-4+12
Add 12 to both sides.
8m=8
Add -4 and 12 to get 8.
m=\frac{8}{8}
Divide both sides by 8.
m=1
Divide 8 by 8 to get 1.
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