M+7=15+3m

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Solution for M+7=15+3m equation: 



+7=15+3M

We move all terms to the left:

+7-(15+3M)=0

We add all the numbers together, and all the variables

-(3M+15)+7=0

We get rid of parentheses

-3M-15+7=0

We add all the numbers together, and all the variables

-3M-8=0

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

-3M=8

M=8/-3

M=-2+2/3

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