-2a+40+9a=5a-8a

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Solution for -2a+40+9a=5a-8a equation: 



-2a+40+9a=5a-8a

We move all terms to the left:

-2a+40+9a-(5a-8a)=0

We add all the numbers together, and all the variables

-2a+9a-(-3a)+40=0

We add all the numbers together, and all the variables

7a-(-3a)+40=0

We get rid of parentheses

7a+3a+40=0

We add all the numbers together, and all the variables

10a+40=0

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

10a=-40

a=-40/10

a=-4

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