(3n+21)+(2n+39)=180

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Solution for (3n+21)+(2n+39)=180 equation: 



(3n+21)+(2n+39)=180

We move all terms to the left:

(3n+21)+(2n+39)-(180)=0

We get rid of parentheses

3n+2n+21+39-180=0

We add all the numbers together, and all the variables

5n-120=0

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

5n=120

n=120/5

n=24

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