30-r=11

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Solution for 30-r=11 equation: 


Simplifying
30 + -1r = 11

Solving
30 + -1r = 11

Solving for variable 'r'.

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

Add '-30' to each side of the equation.
30 + -30 + -1r = 11 + -30

Combine like terms: 30 + -30 = 0
0 + -1r = 11 + -30
-1r = 11 + -30

Combine like terms: 11 + -30 = -19
-1r = -19

Divide each side by '-1'.
r = 19

Simplifying
r = 19

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