64r^2-81p^2=0

Solution for 64r^2-81p^2=0 equation:

Simplifying
64r2 + -81p2 = 0

Reorder the terms:
-81p2 + 64r2 = 0

Solving
-81p2 + 64r2 = 0

Solving for variable 'p'.

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

Add '-64r2' to each side of the equation.
-81p2 + 64r2 + -64r2 = 0 + -64r2

Combine like terms: 64r2 + -64r2 = 0
-81p2 + 0 = 0 + -64r2
-81p2 = 0 + -64r2
Remove the zero:
-81p2 = -64r2

Divide each side by '-81'.
p2 = 0.7901234568r2

Simplifying
p2 = 0.7901234568r2

Take the square root of each side:
p = {-0.888888889r, 0.888888889r}