11=20-5r

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Solution for 11=20-5r equation:


Simplifying
11 = 20 + -5r

Solving
11 = 20 + -5r

Solving for variable 'r'.

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

Add '5r' to each side of the equation.
11 + 5r = 20 + -5r + 5r

Combine like terms: -5r + 5r = 0
11 + 5r = 20 + 0
11 + 5r = 20

Add '-11' to each side of the equation.
11 + -11 + 5r = 20 + -11

Combine like terms: 11 + -11 = 0
0 + 5r = 20 + -11
5r = 20 + -11

Combine like terms: 20 + -11 = 9
5r = 9

Divide each side by '5'.
r = 1.8

Simplifying
r = 1.8

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