(5r^3-9r-9)-(2r^3+8r-2)=

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Solution for (5r^3-9r-9)-(2r^3+8r-2)= equation: 


Simplifying
(5r3 + -9r + -9) + -1(2r3 + 8r + -2) = 0

Reorder the terms:
(-9 + -9r + 5r3) + -1(2r3 + 8r + -2) = 0

Remove parenthesis around (-9 + -9r + 5r3)
-9 + -9r + 5r3 + -1(2r3 + 8r + -2) = 0

Reorder the terms:
-9 + -9r + 5r3 + -1(-2 + 8r + 2r3) = 0
-9 + -9r + 5r3 + (-2 * -1 + 8r * -1 + 2r3 * -1) = 0
-9 + -9r + 5r3 + (2 + -8r + -2r3) = 0

Reorder the terms:
-9 + 2 + -9r + -8r + 5r3 + -2r3 = 0

Combine like terms: -9 + 2 = -7
-7 + -9r + -8r + 5r3 + -2r3 = 0

Combine like terms: -9r + -8r = -17r
-7 + -17r + 5r3 + -2r3 = 0

Combine like terms: 5r3 + -2r3 = 3r3
-7 + -17r + 3r3 = 0

Solving
-7 + -17r + 3r3 = 0

Solving for variable 'r'.

The solution to this equation could not be determined.

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