7r-7r-15=-15

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Solution for 7r-7r-15=-15 equation: 


Simplifying
7r + -7r + -15 = -15

Reorder the terms:
-15 + 7r + -7r = -15

Combine like terms: 7r + -7r = 0
-15 + 0 = -15
-15 = -15

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

Combine like terms: -15 + 15 = 0
0 = -15 + 15

Combine like terms: -15 + 15 = 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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