3 years ago

8+4m=9m-7 check solution

Mathematics

2 answers:

ella [17]3 years ago

4 0

$8+4m=9m-7 \\\\ 4m-9m=-7-8 \\\\ -5m=-15 \\\\ \boxed{m=\frac{-15}{-5}=3}$

Karo-lina-s [1.5K]3 years ago

3 0

$8+4m=9m-7\ \ \ \ |subtract\ 4m\ from\ each\ side\\\\
8=5m-7\ \ \ \ \ |add\ 7 \ to \ each\ side\\\\
15=5m\ \ \ \ |divide\ by\ 5\\\\
m=3\\\\Solution\ is\ m=3.$

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