4y^2-5x^2=81

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Solution for 4y^2-5x^2=81 equation:


Simplifying
4y2 + -5x2 = 81

Reorder the terms:
-5x2 + 4y2 = 81

Solving
-5x2 + 4y2 = 81

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-4y2' to each side of the equation.
-5x2 + 4y2 + -4y2 = 81 + -4y2

Combine like terms: 4y2 + -4y2 = 0
-5x2 + 0 = 81 + -4y2
-5x2 = 81 + -4y2

Divide each side by '-5'.
x2 = -16.2 + 0.8y2

Simplifying
x2 = -16.2 + 0.8y2

Reorder the terms:
16.2 + x2 + -0.8y2 = -16.2 + 0.8y2 + 16.2 + -0.8y2

Reorder the terms:
16.2 + x2 + -0.8y2 = -16.2 + 16.2 + 0.8y2 + -0.8y2

Combine like terms: -16.2 + 16.2 = 0.0
16.2 + x2 + -0.8y2 = 0.0 + 0.8y2 + -0.8y2
16.2 + x2 + -0.8y2 = 0.8y2 + -0.8y2

Combine like terms: 0.8y2 + -0.8y2 = 0.0
16.2 + x2 + -0.8y2 = 0.0

The solution to this equation could not be determined.

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