Solve for m
m=12
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2\times 4=-4+m
Multiply both sides by 4.
8=-4+m
Multiply 2 and 4 to get 8.
-4+m=8
Swap sides so that all variable terms are on the left hand side.
m=8+4
Add 4 to both sides.
m=12
Add 8 and 4 to get 12.
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