180=7n+40

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Solution for 180=7n+40 equation: 



180=7n+40

We move all terms to the left:

180-(7n+40)=0

We get rid of parentheses

-7n-40+180=0

We add all the numbers together, and all the variables

-7n+140=0

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

-7n=-140

n=-140/-7

n=+20

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