X=-12n-7n

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Solution for X=-12n-7n equation: 



X=-12X-7X

We move all terms to the left:

X-(-12X-7X)=0

We add all the numbers together, and all the variables

X-(-19X)=0

We get rid of parentheses

X+19X=0

We add all the numbers together, and all the variables

20X=0

X=0/20

X=0

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