9x^2-0.64y^2=0

Solution for 9x^2-0.64y^2=0 equation:

Simplifying
9x2 + -0.64y2 = 0

Solving
9x2 + -0.64y2 = 0

Solving for variable 'x'.

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

Add '0.64y2' to each side of the equation.
9x2 + -0.64y2 + 0.64y2 = 0 + 0.64y2

Combine like terms: -0.64y2 + 0.64y2 = 0.00
9x2 + 0.00 = 0 + 0.64y2
9x2 = 0 + 0.64y2
Remove the zero:
9x2 = 0.64y2

Divide each side by '9'.
x2 = 0.07111111111y2

Simplifying
x2 = 0.07111111111y2

Take the square root of each side:
x = {-0.266666667y, 0.266666667y}