4r-9+1+8r=

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Solution for 4r-9+1+8r= equation:


Simplifying
4r + -9 + 1 + 8r = 0

Reorder the terms:
-9 + 1 + 4r + 8r = 0

Combine like terms: -9 + 1 = -8
-8 + 4r + 8r = 0

Combine like terms: 4r + 8r = 12r
-8 + 12r = 0

Solving
-8 + 12r = 0

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 12r = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 12r = 0 + 8
12r = 0 + 8

Combine like terms: 0 + 8 = 8
12r = 8

Divide each side by '12'.
r = 0.6666666667

Simplifying
r = 0.6666666667

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