12-x=-x+3

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Solution for 12-x=-x+3 equation: 


Simplifying
12 + -1x = -1x + 3

Reorder the terms:
12 + -1x = 3 + -1x

Add 'x' to each side of the equation.
12 + -1x + x = 3 + -1x + x

Combine like terms: -1x + x = 0
12 + 0 = 3 + -1x + x
12 = 3 + -1x + x

Combine like terms: -1x + x = 0
12 = 3 + 0
12 = 3

Solving
12 = 3

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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