180=47+2a+a-20

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Solution for 180=47+2a+a-20 equation: 



180=47+2a+a-20

We move all terms to the left:

180-(47+2a+a-20)=0

We add all the numbers together, and all the variables

-(3a+27)+180=0

We get rid of parentheses

-3a-27+180=0

We add all the numbers together, and all the variables

-3a+153=0

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

-3a=-153

a=-153/-3

a=+51

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