r-2r=-1

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Solution for r-2r=-1 equation: 


Simplifying
r + -2r = -1

Combine like terms: r + -2r = -1r
-1r = -1

Solving
-1r = -1

Solving for variable 'r'.

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

Divide each side by '-1'.
r = 1

Simplifying
r = 1

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