(a+27)+(a-5)+(a-7)=180

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Solution for (a+27)+(a-5)+(a-7)=180 equation: 



(a+27)+(a-5)+(a-7)=180

We move all terms to the left:

(a+27)+(a-5)+(a-7)-(180)=0

We get rid of parentheses

a+a+a+27-5-7-180=0

We add all the numbers together, and all the variables

3a-165=0

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

3a=165

a=165/3

a=55

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