81z^2-25x^2=0

Solution for 81z^2-25x^2=0 equation:

Simplifying
81z2 + -25x2 = 0

Reorder the terms:
-25x2 + 81z2 = 0

Solving
-25x2 + 81z2 = 0

Solving for variable 'x'.

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

Add '-81z2' to each side of the equation.
-25x2 + 81z2 + -81z2 = 0 + -81z2

Combine like terms: 81z2 + -81z2 = 0
-25x2 + 0 = 0 + -81z2
-25x2 = 0 + -81z2
Remove the zero:
-25x2 = -81z2

Divide each side by '-25'.
x2 = 3.24z2

Simplifying
x2 = 3.24z2

Take the square root of each side:
x = {-1.8z, 1.8z}