8+x=-x

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Solution for 8+x=-x equation: 



8+x=-x

We move all terms to the left:

8+x-(-x)=0

We add all the numbers together, and all the variables

x-(-1x)+8=0

We get rid of parentheses

x+1x+8=0

We add all the numbers together, and all the variables

2x+8=0

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

2x=-8

x=-8/2

x=-4

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