-15-aa=7

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Solution for -15-aa=7 equation: 



-15-aa=7

We move all terms to the left:

-15-aa-(7)=0

We add all the numbers together, and all the variables

-aa-22=0

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

-aa=22

a=22/1

a=22

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