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iren2701 [21]
3 years ago
8

4m + 9 + 5m - 12 = 42

Mathematics
2 answers:
MrRissso [65]3 years ago
4 0
4m+9+5m-12=42 is 5. m= 5.
Fiesta28 [93]3 years ago
3 0
First, combine like terms.

4m+5m = 9m

9m + 9 - 12 = 42

9-12= -3

9m - 3 = 42

Second, apply the inverse operation to isolate the variable.

9m - 3 = 42
      +3     +3

9m = 45

Third, divide 9 by both sides to solve for m.

\frac{9m}{9} =  \frac{45}{9}

m = 45/9

m = 5

Answer:  m = 5
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