(x+9)+(x+3)+(x+3)=180

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Solution for (x+9)+(x+3)+(x+3)=180 equation: 



(x+9)+(x+3)+(x+3)=180

We move all terms to the left:

(x+9)+(x+3)+(x+3)-(180)=0

We get rid of parentheses

x+x+x+9+3+3-180=0

We add all the numbers together, and all the variables

3x-165=0

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

3x=165

x=165/3

x=55

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