-15a-40=23-8a

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Solution for -15a-40=23-8a equation: 



-15a-40=23-8a

We move all terms to the left:

-15a-40-(23-8a)=0

We add all the numbers together, and all the variables

-15a-(-8a+23)-40=0

We get rid of parentheses

-15a+8a-23-40=0

We add all the numbers together, and all the variables

-7a-63=0

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

-7a=63

a=63/-7

a=-9

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