X+9=-x-7

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Solution for X+9=-x-7 equation: 



X+9=-X-7

We move all terms to the left:

X+9-(-X-7)=0

We add all the numbers together, and all the variables

X-(-1X-7)+9=0

We get rid of parentheses

X+1X+7+9=0

We add all the numbers together, and all the variables

2X+16=0

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

2X=-16

X=-16/2

X=-8

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