20=2+9r

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Solution for 20=2+9r equation:


Simplifying
20 = 2 + 9r

Solving
20 = 2 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
20 + -9r = 2 + 9r + -9r

Combine like terms: 9r + -9r = 0
20 + -9r = 2 + 0
20 + -9r = 2

Add '-20' to each side of the equation.
20 + -20 + -9r = 2 + -20

Combine like terms: 20 + -20 = 0
0 + -9r = 2 + -20
-9r = 2 + -20

Combine like terms: 2 + -20 = -18
-9r = -18

Divide each side by '-9'.
r = 2

Simplifying
r = 2

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