20+r=11

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Solution for 20+r=11 equation: 


Simplifying
20 + r = 11

Solving
20 + r = 11

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 + r = 11 + -20

Combine like terms: 20 + -20 = 0
0 + r = 11 + -20
r = 11 + -20

Combine like terms: 11 + -20 = -9
r = -9

Simplifying
r = -9

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