-3r-8=-20

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Solution for -3r-8=-20 equation: 


Simplifying
-3r + -8 = -20

Reorder the terms:
-8 + -3r = -20

Solving
-8 + -3r = -20

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 = -20 + 8

Combine like terms: -8 + 8 = 0
0 + -3r = -20 + 8
-3r = -20 + 8

Combine like terms: -20 + 8 = -12
-3r = -12

Divide each side by '-3'.
r = 4

Simplifying
r = 4

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