20-2r=30

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Solution for 20-2r=30 equation: 


Simplifying
20 + -2r = 30

Solving
20 + -2r = 30

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 = 30 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 30 + -20
-2r = 30 + -20

Combine like terms: 30 + -20 = 10
-2r = 10

Divide each side by '-2'.
r = -5

Simplifying
r = -5

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