x+x=3x-x

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Solution for x+x=3x-x equation: 


Simplifying
x + x = 3x + -1x

Combine like terms: x + x = 2x
2x = 3x + -1x

Combine like terms: 3x + -1x = 2x
2x = 2x

Add '-2x' to each side of the equation.
2x + -2x = 2x + -2x

Combine like terms: 2x + -2x = 0
0 = 2x + -2x

Combine like terms: 2x + -2x = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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