81=16t^2

Solution for 81=16t^2 equation:

Simplifying
81 = 16t2

Solving
81 = 16t2

Solving for variable 't'.

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

Add '-16t2' to each side of the equation.
81 + -16t2 = 16t2 + -16t2

Combine like terms: 16t2 + -16t2 = 0
81 + -16t2 = 0

Add '-81' to each side of the equation.
81 + -81 + -16t2 = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -16t2 = 0 + -81
-16t2 = 0 + -81

Combine like terms: 0 + -81 = -81
-16t2 = -81

Divide each side by '-16'.
t2 = 5.0625

Simplifying
t2 = 5.0625

Take the square root of each side:
t = {-2.25, 2.25}