x+9=-x+15

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Solution for x+9=-x+15 equation: 



x+9=-x+15

We move all terms to the left:

x+9-(-x+15)=0

We add all the numbers together, and all the variables

x-(-1x+15)+9=0

We get rid of parentheses

x+1x-15+9=0

We add all the numbers together, and all the variables

2x-6=0

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

2x=6

x=6/2

x=3

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