4x+21=4x-12

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Solution for 4x+21=4x-12 equation:


Simplifying
4x + 21 = 4x + -12

Reorder the terms:
21 + 4x = 4x + -12

Reorder the terms:
21 + 4x = -12 + 4x

Add '-4x' to each side of the equation.
21 + 4x + -4x = -12 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + 0 = -12 + 4x + -4x
21 = -12 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 = -12 + 0
21 = -12

Solving
21 = -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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