r-2r-8=0

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Solution for r-2r-8=0 equation: 


Simplifying
r + -2r + -8 = 0

Reorder the terms:
-8 + r + -2r = 0

Combine like terms: r + -2r = -1r
-8 + -1r = 0

Solving
-8 + -1r = 0

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 + -1r = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -1r = 0 + 8
-1r = 0 + 8

Combine like terms: 0 + 8 = 8
-1r = 8

Divide each side by '-1'.
r = -8

Simplifying
r = -8

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