1x+2x=3x

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Solution for 1x+2x=3x equation: 


Simplifying
1x + 2x = 3x

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

Add '-3x' to each side of the equation.
3x + -3x = 3x + -3x

Combine like terms: 3x + -3x = 0
0 = 3x + -3x

Combine like terms: 3x + -3x = 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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