8=3r-9

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Solution for 8=3r-9 equation:


Simplifying
8 = 3r + -9

Reorder the terms:
8 = -9 + 3r

Solving
8 = -9 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
8 + -3r = -9 + 3r + -3r

Combine like terms: 3r + -3r = 0
8 + -3r = -9 + 0
8 + -3r = -9

Add '-8' to each side of the equation.
8 + -8 + -3r = -9 + -8

Combine like terms: 8 + -8 = 0
0 + -3r = -9 + -8
-3r = -9 + -8

Combine like terms: -9 + -8 = -17
-3r = -17

Divide each side by '-3'.
r = 5.666666667

Simplifying
r = 5.666666667

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