5(r-8)=-9

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Solution for 5(r-8)=-9 equation: 


Simplifying
5(r + -8) = -9

Reorder the terms:
5(-8 + r) = -9
(-8 * 5 + r * 5) = -9
(-40 + 5r) = -9

Solving
-40 + 5r = -9

Solving for variable 'r'.

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

Add '40' to each side of the equation.
-40 + 40 + 5r = -9 + 40

Combine like terms: -40 + 40 = 0
0 + 5r = -9 + 40
5r = -9 + 40

Combine like terms: -9 + 40 = 31
5r = 31

Divide each side by '5'.
r = 6.2

Simplifying
r = 6.2

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