math

4m+9+5m-12= 42

my question is how to get m=5 (the answer) can u show me the steps to do this problem right please because i keep getting 6 ?

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1. 4m+5m=9m
and
9-12 = -3
so what we have is
9 m - 3 = 42
add 3 to both sides
9 m = 45
divide both sides by 9
m = 5

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posted by Damon
2. thank you !

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posted by me

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