180-72+2a=180

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Solution for 180-72+2a=180 equation: 



180-72+2a=180

We move all terms to the left:

180-72+2a-(180)=0

We add all the numbers together, and all the variables

2a-72=0

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

2a=72

a=72/2

a=36

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