2a+11+a+12=180

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Solution for 2a+11+a+12=180 equation: 



2a+11+a+12=180

We move all terms to the left:

2a+11+a+12-(180)=0

We add all the numbers together, and all the variables

3a-157=0

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

3a=157

a=157/3

a=52+1/3

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