x+(x+3)+(7x-3)=180

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Solution for x+(x+3)+(7x-3)=180 equation: 



x+(x+3)+(7x-3)=180

We move all terms to the left:

x+(x+3)+(7x-3)-(180)=0

We get rid of parentheses

x+x+7x+3-3-180=0

We add all the numbers together, and all the variables

9x-180=0

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

9x=180

x=180/9

x=20

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