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Solve for m
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m-1=3m+9
Multiply both sides of the equation by 3.
m-1-3m=9
Subtract 3m from both sides.
-2m-1=9
Combine m and -3m to get -2m.
-2m=9+1
Add 1 to both sides.
-2m=10
Add 9 and 1 to get 10.
m=\frac{10}{-2}
Divide both sides by -2.
m=-5
Divide 10 by -2 to get -5.