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Simplifying
64x2 + -81y2 = 0
Solving
64x2 + -81y2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '81y2' to each side of the equation.
64x2 + -81y2 + 81y2 = 0 + 81y2
Combine like terms: -81y2 + 81y2 = 0
64x2 + 0 = 0 + 81y2
64x2 = 0 + 81y2
Remove the zero:
64x2 = 81y2
Divide each side by '64'.
x2 = 1.265625y2
Simplifying
x2 = 1.265625y2
Take the square root of each side:
x = {-1.125y, 1.125y}
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