5(r+1.7)-9r=12.3

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Solution for 5(r+1.7)-9r=12.3 equation: 


Simplifying
5(r + 1.7) + -9r = 12.3

Reorder the terms:
5(1.7 + r) + -9r = 12.3
(1.7 * 5 + r * 5) + -9r = 12.3
(8.5 + 5r) + -9r = 12.3

Combine like terms: 5r + -9r = -4r
8.5 + -4r = 12.3

Solving
8.5 + -4r = 12.3

Solving for variable 'r'.

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

Add '-8.5' to each side of the equation.
8.5 + -8.5 + -4r = 12.3 + -8.5

Combine like terms: 8.5 + -8.5 = 0.0
0.0 + -4r = 12.3 + -8.5
-4r = 12.3 + -8.5

Combine like terms: 12.3 + -8.5 = 3.8
-4r = 3.8

Divide each side by '-4'.
r = -0.95

Simplifying
r = -0.95

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