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7(m-12)=5m a) -7 b) 6 c) 42 d) -42

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asked Apr 25, 2016 31.7k views

5 votes

7(m-12)=5m
a) -7
b) 6
c) 42
d) -42

Mathematics
high-school

James Austin asked

by James Austin

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2 Answers

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7(m-12) = 5m

7m - 84 = 5m

2m - 84 = 0

2m = 84

m = 42

The answer is C) 42

Melena answered Apr 25, 2016

by Melena

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$7(m-12)=5m \\ \\ 7m - 84 = 5m \\ \\ -84 = 5m - 7m \\ \\ -84 = -2m \\ \\ (-84)/(-2) = m \\ \\ (84)/(2) = m \\ \\ 42 = m \\ \\ m = 42 \\ \\ Answer: \fbox {m = 42}$

PollusB answered Apr 30, 2016

by PollusB

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7(m-12)=5m a) -7 b) 6 c) 42 d) -42

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