40+2a+2a=180

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Solution for 40+2a+2a=180 equation: 



40+2a+2a=180

We move all terms to the left:

40+2a+2a-(180)=0

We add all the numbers together, and all the variables

4a-140=0

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

4a=140

a=140/4

a=35

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