a+15+7a+a=180

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Solution for a+15+7a+a=180 equation: 



a+15+7a+a=180

We move all terms to the left:

a+15+7a+a-(180)=0

We add all the numbers together, and all the variables

9a-165=0

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

9a=165

a=165/9

a=18+1/3

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