-2r+20=200

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Solution for -2r+20=200 equation: 


Simplifying
-2r + 20 = 200

Reorder the terms:
20 + -2r = 200

Solving
20 + -2r = 200

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + -2r = 200 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 200 + -20
-2r = 200 + -20

Combine like terms: 200 + -20 = 180
-2r = 180

Divide each side by '-2'.
r = -90

Simplifying
r = -90

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