(11x+42)+(10x-9)=180

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Solution for (11x+42)+(10x-9)=180 equation: 



(11x+42)+(10x-9)=180

We move all terms to the left:

(11x+42)+(10x-9)-(180)=0

We get rid of parentheses

11x+10x+42-9-180=0

We add all the numbers together, and all the variables

21x-147=0

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

21x=147

x=147/21

x=7

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