2a-20+2a-72=180

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Solution for 2a-20+2a-72=180 equation: 



2a-20+2a-72=180

We move all terms to the left:

2a-20+2a-72-(180)=0

We add all the numbers together, and all the variables

4a-272=0

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

4a=272

a=272/4

a=68

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