(7x^3-9x^2+4x-4)-(3x^3-2x^2-6x+4)=

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Solution for (7x^3-9x^2+4x-4)-(3x^3-2x^2-6x+4)= equation: 


Simplifying
(7x3 + -9x2 + 4x + -4) + -1(3x3 + -2x2 + -6x + 4) = 0

Reorder the terms:
(-4 + 4x + -9x2 + 7x3) + -1(3x3 + -2x2 + -6x + 4) = 0

Remove parenthesis around (-4 + 4x + -9x2 + 7x3)
-4 + 4x + -9x2 + 7x3 + -1(3x3 + -2x2 + -6x + 4) = 0

Reorder the terms:
-4 + 4x + -9x2 + 7x3 + -1(4 + -6x + -2x2 + 3x3) = 0
-4 + 4x + -9x2 + 7x3 + (4 * -1 + -6x * -1 + -2x2 * -1 + 3x3 * -1) = 0
-4 + 4x + -9x2 + 7x3 + (-4 + 6x + 2x2 + -3x3) = 0

Reorder the terms:
-4 + -4 + 4x + 6x + -9x2 + 2x2 + 7x3 + -3x3 = 0

Combine like terms: -4 + -4 = -8
-8 + 4x + 6x + -9x2 + 2x2 + 7x3 + -3x3 = 0

Combine like terms: 4x + 6x = 10x
-8 + 10x + -9x2 + 2x2 + 7x3 + -3x3 = 0

Combine like terms: -9x2 + 2x2 = -7x2
-8 + 10x + -7x2 + 7x3 + -3x3 = 0

Combine like terms: 7x3 + -3x3 = 4x3
-8 + 10x + -7x2 + 4x3 = 0

Solving
-8 + 10x + -7x2 + 4x3 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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