(81x^2)-(100y^2)=

Solution for (81x^2)-(100y^2)= equation:

Simplifying
(81x2) + -1(100y2) = 0

Remove parenthesis around (100y2)
(81x2) + -1 * 100y2 = 0

Multiply -1 * 100
(81x2) + -100y2 = 0

Solving
(81x2) + -100y2 = 0

Solving for variable 'x'.

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

Add '100y2' to each side of the equation.
(81x2) + -100y2 + 100y2 = 0 + 100y2

Combine like terms: -100y2 + 100y2 = 0
(81x2) + 0 = 0 + 100y2
(81x2) = 0 + 100y2
Remove the zero:
(81x2) = 100y2

Divide each side by '81'.
x2 = 1.234567901y2

Simplifying
x2 = 1.234567901y2

Take the square root of each side:
x = {-1.111111111y, 1.111111111y}