X=-7-2n

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Solution for X=-7-2n equation: 



X=-7-2X

We move all terms to the left:

X-(-7-2X)=0

We add all the numbers together, and all the variables

X-(-2X-7)=0

We get rid of parentheses

X+2X+7=0

We add all the numbers together, and all the variables

3X+7=0

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

3X=-7

X=-7/3

X=-2+1/3

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