(7x^4-6x^3y+3xy^2-y)-(-9x^4-5x^3y-xy^2+2y)=

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Solution for (7x^4-6x^3y+3xy^2-y)-(-9x^4-5x^3y-xy^2+2y)= equation:


Simplifying
(7x4 + -6x3y + 3xy2 + -1y) + -1(-9x4 + -5x3y + -1xy2 + 2y) = 0

Reorder the terms:
(3xy2 + -6x3y + 7x4 + -1y) + -1(-9x4 + -5x3y + -1xy2 + 2y) = 0

Remove parenthesis around (3xy2 + -6x3y + 7x4 + -1y)
3xy2 + -6x3y + 7x4 + -1y + -1(-9x4 + -5x3y + -1xy2 + 2y) = 0

Reorder the terms:
3xy2 + -6x3y + 7x4 + -1y + -1(-1xy2 + -5x3y + -9x4 + 2y) = 0
3xy2 + -6x3y + 7x4 + -1y + (-1xy2 * -1 + -5x3y * -1 + -9x4 * -1 + 2y * -1) = 0
3xy2 + -6x3y + 7x4 + -1y + (1xy2 + 5x3y + 9x4 + -2y) = 0

Reorder the terms:
3xy2 + 1xy2 + -6x3y + 5x3y + 7x4 + 9x4 + -1y + -2y = 0

Combine like terms: 3xy2 + 1xy2 = 4xy2
4xy2 + -6x3y + 5x3y + 7x4 + 9x4 + -1y + -2y = 0

Combine like terms: -6x3y + 5x3y = -1x3y
4xy2 + -1x3y + 7x4 + 9x4 + -1y + -2y = 0

Combine like terms: 7x4 + 9x4 = 16x4
4xy2 + -1x3y + 16x4 + -1y + -2y = 0

Combine like terms: -1y + -2y = -3y
4xy2 + -1x3y + 16x4 + -3y = 0

Solving
4xy2 + -1x3y + 16x4 + -3y = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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