7a+a+78=180

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Solution for 7a+a+78=180 equation: 



7a+a+78=180

We move all terms to the left:

7a+a+78-(180)=0

We add all the numbers together, and all the variables

8a-102=0

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

8a=102

a=102/8

a=12+3/4

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