Solve for m
m=28
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-9\left(-3\right)=m-1
Multiply both sides by -3.
27=m-1
Multiply -9 and -3 to get 27.
m-1=27
Swap sides so that all variable terms are on the left hand side.
m=27+1
Add 1 to both sides.
m=28
Add 27 and 1 to get 28.
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