4w^2-81d^2=0

Solution for 4w^2-81d^2=0 equation:

Simplifying
4w2 + -81d2 = 0

Reorder the terms:
-81d2 + 4w2 = 0

Solving
-81d2 + 4w2 = 0

Solving for variable 'd'.

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

Add '-4w2' to each side of the equation.
-81d2 + 4w2 + -4w2 = 0 + -4w2

Combine like terms: 4w2 + -4w2 = 0
-81d2 + 0 = 0 + -4w2
-81d2 = 0 + -4w2
Remove the zero:
-81d2 = -4w2

Divide each side by '-81'.
d2 = 0.04938271605w2

Simplifying
d2 = 0.04938271605w2

Take the square root of each side:
d = {-0.222222222w, 0.222222222w}