-3r-8=15

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Solution for -3r-8=15 equation: 


Simplifying
-3r + -8 = 15

Reorder the terms:
-8 + -3r = 15

Solving
-8 + -3r = 15

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 + -3r = 15 + 8

Combine like terms: -8 + 8 = 0
0 + -3r = 15 + 8
-3r = 15 + 8

Combine like terms: 15 + 8 = 23
-3r = 23

Divide each side by '-3'.
r = -7.666666667

Simplifying
r = -7.666666667

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