1-2n=-7

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Solution for 1-2n=-7 equation: 



1-2n=-7

We move all terms to the left:

1-2n-(-7)=0

We add all the numbers together, and all the variables

-2n+8=0

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

-2n=-8

n=-8/-2

n=+4

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