7a+a+a=360

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Solution for 7a+a+a=360 equation: 



7a+a+a=360

We move all terms to the left:

7a+a+a-(360)=0

We add all the numbers together, and all the variables

9a-360=0

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

9a=360

a=360/9

a=40

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