8-7n=-9n

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Solution for 8-7n=-9n equation: 



8-7n=-9n

We move all terms to the left:

8-7n-(-9n)=0

We get rid of parentheses

-7n+9n+8=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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