9r-20=16

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Solution for 9r-20=16 equation: 


Simplifying
9r + -20 = 16

Reorder the terms:
-20 + 9r = 16

Solving
-20 + 9r = 16

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 + 9r = 16 + 20

Combine like terms: -20 + 20 = 0
0 + 9r = 16 + 20
9r = 16 + 20

Combine like terms: 16 + 20 = 36
9r = 36

Divide each side by '9'.
r = 4

Simplifying
r = 4

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