-2r=-4r+20

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Solution for -2r=-4r+20 equation: 


Simplifying
-2r = -4r + 20

Reorder the terms:
-2r = 20 + -4r

Solving
-2r = 20 + -4r

Solving for variable 'r'.

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

Add '4r' to each side of the equation.
-2r + 4r = 20 + -4r + 4r

Combine like terms: -2r + 4r = 2r
2r = 20 + -4r + 4r

Combine like terms: -4r + 4r = 0
2r = 20 + 0
2r = 20

Divide each side by '2'.
r = 10

Simplifying
r = 10

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