3a-84+a=180

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Solution for 3a-84+a=180 equation: 



3a-84+a=180

We move all terms to the left:

3a-84+a-(180)=0

We add all the numbers together, and all the variables

4a-264=0

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

4a=264

a=264/4

a=66

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