31=10a-5+2a

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Solution for 31=10a-5+2a equation: 



31=10a-5+2a

We move all terms to the left:

31-(10a-5+2a)=0

We add all the numbers together, and all the variables

-(12a-5)+31=0

We get rid of parentheses

-12a+5+31=0

We add all the numbers together, and all the variables

-12a+36=0

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

-12a=-36

a=-36/-12

a=+3

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