6.9=-2n

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Solution for 6.9=-2n equation: 



6.9=-2n

We move all terms to the left:

6.9-(-2n)=0

We get rid of parentheses

2n+6.9=0

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

2n=-6.9

n=-6.9/2

n=-3+0.9/2

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