7a-5a-a-1=15

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Solution for 7a-5a-a-1=15 equation: 



7a-5a-a-1=15

We move all terms to the left:

7a-5a-a-1-(15)=0

We add all the numbers together, and all the variables

a-16=0

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

a=16

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