9514 1404 393
Answer:
m = 5
Step-by-step explanation:
Recognize that the number on the right has -3 as a factor. Divide both sides of the equation by -3.
m -2 = 3
Add 2 to both sides of the equation:
m = 5
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Additional comment
Perhaps the conventional approach is to eliminate parentheses, then solve the resulting 2-step linear equation.
-3m +6 = -9
-3m = -15 . . . . . . subtract 6 (step 1)
m = 5 . . . . . . . . . divide by the coefficient of m (step 2)
