(3x+9)+(3x-15)=180

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Solution for (3x+9)+(3x-15)=180 equation: 



(3x+9)+(3x-15)=180

We move all terms to the left:

(3x+9)+(3x-15)-(180)=0

We get rid of parentheses

3x+3x+9-15-180=0

We add all the numbers together, and all the variables

6x-186=0

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

6x=186

x=186/6

x=31

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