-123=7n+3

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Solution for -123=7n+3 equation: 



-123=7n+3

We move all terms to the left:

-123-(7n+3)=0

We get rid of parentheses

-7n-3-123=0

We add all the numbers together, and all the variables

-7n-126=0

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

-7n=126

n=126/-7

n=-18

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