M-2(m+3)=78

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Solution for M-2(m+3)=78 equation: 



-2(M+3)=78

We move all terms to the left:

-2(M+3)-(78)=0

We multiply parentheses

-2M-6-78=0

We add all the numbers together, and all the variables

-2M-84=0

We move all terms containing M to the left, all other terms to the right

-2M=84

M=84/-2

M=-42

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