9+x=7-x

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Solution for 9+x=7-x equation: 



9+x=7-x

We move all terms to the left:

9+x-(7-x)=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+2=0

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

2x=-2

x=-2/2

x=-1

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