x-3=-x

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Solution for x-3=-x equation: 



x-3=-x

We move all terms to the left:

x-3-(-x)=0

We add all the numbers together, and all the variables

x-(-1x)-3=0

We get rid of parentheses

x+1x-3=0

We add all the numbers together, and all the variables

2x-3=0

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

2x=3

x=3/2

x=1+1/2

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