a+15+4a+a=99

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Solution for a+15+4a+a=99 equation: 



a+15+4a+a=99

We move all terms to the left:

a+15+4a+a-(99)=0

We add all the numbers together, and all the variables

6a-84=0

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

6a=84

a=84/6

a=14

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