-2a+a=-15+4a

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Solution for -2a+a=-15+4a equation: 



-2a+a=-15+4a

We move all terms to the left:

-2a+a-(-15+4a)=0

We add all the numbers together, and all the variables

-2a+a-(4a-15)=0

We add all the numbers together, and all the variables

-1a-(4a-15)=0

We get rid of parentheses

-1a-4a+15=0

We add all the numbers together, and all the variables

-5a+15=0

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

-5a=-15

a=-15/-5

a=+3

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