(7x+45)+(2x+115)=180

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Solution for (7x+45)+(2x+115)=180 equation: 



(7x+45)+(2x+115)=180

We move all terms to the left:

(7x+45)+(2x+115)-(180)=0

We get rid of parentheses

7x+2x+45+115-180=0

We add all the numbers together, and all the variables

9x-20=0

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

9x=20

x=20/9

x=2+2/9

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