3x=3x-12

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Solution for 3x=3x-12 equation: 


Simplifying
3x = 3x + -12

Reorder the terms:
3x = -12 + 3x

Add '-3x' to each side of the equation.
3x + -3x = -12 + 3x + -3x

Combine like terms: 3x + -3x = 0
0 = -12 + 3x + -3x

Combine like terms: 3x + -3x = 0
0 = -12 + 0
0 = -12

Solving
0 = -12

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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