a+a+2a+2a+a+20+a+20=180

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



a+a+2a+2a+a+20+a+20=180

We move all terms to the left:

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

We add all the numbers together, and all the variables

8a-140=0

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

8a=140

a=140/8

a=17+1/2

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