-7-8a=5+4a

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Solution for -7-8a=5+4a equation: 



-7-8a=5+4a

We move all terms to the left:

-7-8a-(5+4a)=0

We add all the numbers together, and all the variables

-8a-(4a+5)-7=0

We get rid of parentheses

-8a-4a-5-7=0

We add all the numbers together, and all the variables

-12a-12=0

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

-12a=12

a=12/-12

a=-1

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