Answer:
4 is your value for m.
Step-by-step explanation:
Note the equal sign, what you do to one side, you do to the other. Isolate the variable, m. Do the opposite of PEMDAS.
First, add 5 & m to both sides:
2m (+ m) - 5 (+ 5) = - m (+ m) + 7 (+ 5)
2m + m = 7 + 5
Simplify. Combine like terms:
3m = 12
Isolate the variable, m. Divide 3 from both sides:
(3m)/3 = (12)/3
m = 12/3
m = 4
m = 4 is your answer.
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19?
Factor using the perfect square rule.
:)
