64s^2-81f^2=0

Solution for 64s^2-81f^2=0 equation:

Simplifying
64s2 + -81f2 = 0

Reorder the terms:
-81f2 + 64s2 = 0

Solving
-81f2 + 64s2 = 0

Solving for variable 'f'.

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

Add '-64s2' to each side of the equation.
-81f2 + 64s2 + -64s2 = 0 + -64s2

Combine like terms: 64s2 + -64s2 = 0
-81f2 + 0 = 0 + -64s2
-81f2 = 0 + -64s2
Remove the zero:
-81f2 = -64s2

Divide each side by '-81'.
f2 = 0.7901234568s2

Simplifying
f2 = 0.7901234568s2

Take the square root of each side:
f = {-0.888888889s, 0.888888889s}