(2n+21)+(5n+40)=180

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Solution for (2n+21)+(5n+40)=180 equation: 



(2n+21)+(5n+40)=180

We move all terms to the left:

(2n+21)+(5n+40)-(180)=0

We get rid of parentheses

2n+5n+21+40-180=0

We add all the numbers together, and all the variables

7n-119=0

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

7n=119

n=119/7

n=17

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