(5n+21)+(2n+12)=180

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Solution for (5n+21)+(2n+12)=180 equation: 



(5n+21)+(2n+12)=180

We move all terms to the left:

(5n+21)+(2n+12)-(180)=0

We get rid of parentheses

5n+2n+21+12-180=0

We add all the numbers together, and all the variables

7n-147=0

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

7n=147

n=147/7

n=21

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