-7=-1+2n

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Solution for -7=-1+2n equation: 



-7=-1+2n

We move all terms to the left:

-7-(-1+2n)=0

We add all the numbers together, and all the variables

-(2n-1)-7=0

We get rid of parentheses

-2n+1-7=0

We add all the numbers together, and all the variables

-2n-6=0

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

-2n=6

n=6/-2

n=-3

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