-2r=-r-4

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Solution for -2r=-r-4 equation: 


Simplifying
-2r = -1r + -4

Reorder the terms:
-2r = -4 + -1r

Solving
-2r = -4 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-2r + r = -4 + -1r + r

Combine like terms: -2r + r = -1r
-1r = -4 + -1r + r

Combine like terms: -1r + r = 0
-1r = -4 + 0
-1r = -4

Divide each side by '-1'.
r = 4

Simplifying
r = 4

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