M+9=-3m-7

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Solution for M+9=-3m-7 equation: 



+9=-3M-7

We move all terms to the left:

+9-(-3M-7)=0

We get rid of parentheses

3M+7+9=0

We add all the numbers together, and all the variables

3M+16=0

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

3M=-16

M=-16/3

M=-5+1/3

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