M+2m+(m+10)=90

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Solution for M+2m+(m+10)=90 equation: 



+2M+(M+10)=90

We move all terms to the left:

+2M+(M+10)-(90)=0

We get rid of parentheses

2M+M+10-90=0

We add all the numbers together, and all the variables

3M-80=0

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

3M=80

M=80/3

M=26+2/3

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