(-7r)+(7r)=

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Solution for (-7r)+(7r)= equation: 


Simplifying
(-7r) + (7r) = 0

Combine like terms: (-7r) + (7r) = 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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