x-15=x-21

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Solution for x-15=x-21 equation:


Simplifying
x + -15 = x + -21

Reorder the terms:
-15 + x = x + -21

Reorder the terms:
-15 + x = -21 + x

Add '-1x' to each side of the equation.
-15 + x + -1x = -21 + x + -1x

Combine like terms: x + -1x = 0
-15 + 0 = -21 + x + -1x
-15 = -21 + x + -1x

Combine like terms: x + -1x = 0
-15 = -21 + 0
-15 = -21

Solving
-15 = -21

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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