r+r=0

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Solution for r+r=0 equation: 


Simplifying
r + r = 0

Combine like terms: r + r = 2r
2r = 0

Solving
2r = 0

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '2'.
r = 0

Simplifying
r = 0

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