12r+9r-16=

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Solution for 12r+9r-16= equation:


Simplifying
12r + 9r + -16 = 0

Reorder the terms:
-16 + 12r + 9r = 0

Combine like terms: 12r + 9r = 21r
-16 + 21r = 0

Solving
-16 + 21r = 0

Solving for variable 'r'.

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

Add '16' to each side of the equation.
-16 + 16 + 21r = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 21r = 0 + 16
21r = 0 + 16

Combine like terms: 0 + 16 = 16
21r = 16

Divide each side by '21'.
r = 0.7619047619

Simplifying
r = 0.7619047619

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