21r-6=21r-6

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Solution for 21r-6=21r-6 equation:


Simplifying
21r + -6 = 21r + -6

Reorder the terms:
-6 + 21r = 21r + -6

Reorder the terms:
-6 + 21r = -6 + 21r

Add '6' to each side of the equation.
-6 + 6 + 21r = -6 + 6 + 21r

Combine like terms: -6 + 6 = 0
0 + 21r = -6 + 6 + 21r
21r = -6 + 6 + 21r

Combine like terms: -6 + 6 = 0
21r = 0 + 21r
21r = 21r

Add '-21r' to each side of the equation.
21r + -21r = 21r + -21r

Combine like terms: 21r + -21r = 0
0 = 21r + -21r

Combine like terms: 21r + -21r = 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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