34+2a+20+a+12=180

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Solution for 34+2a+20+a+12=180 equation: 



34+2a+20+a+12=180

We move all terms to the left:

34+2a+20+a+12-(180)=0

We add all the numbers together, and all the variables

3a-114=0

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

3a=114

a=114/3

a=38

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