(a+20)+(2a+10)=180

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Solution for (a+20)+(2a+10)=180 equation: 



(a+20)+(2a+10)=180

We move all terms to the left:

(a+20)+(2a+10)-(180)=0

We get rid of parentheses

a+2a+20+10-180=0

We add all the numbers together, and all the variables

3a-150=0

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

3a=150

a=150/3

a=50

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