Question

qual valor de m?
m = -3 (m - 4)
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Answer 1

Resposta:

m = -3m + 12

4m = 12

m = 3

.......

Answer 2

$m=-3\left(m-4\right)\\\\m=-3m+12\\\\m+3m=-3m+12+3m\\\\4m=12\\\\\frac{4m}{4}=\frac{12}{4}\\\\m=3$