7=4+-2n

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Solution for 7=4+-2n equation: 



7=4+-2n

We move all terms to the left:

7-(4+-2n)=0

We add all the numbers together, and all the variables

-(-2n)+7=0

We get rid of parentheses

2n+7=0

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

2n=-7

n=-7/2

n=-3+1/2

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