90=300(.30)(t)

Solution for 90=300(.30)(t) equation:

Simplifying
90 = 300(0.30)(t)

Multiply 300 * 0.30
90 = 90t

Solving
90 = 90t

Solving for variable 't'.

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

Add '-90t' to each side of the equation.
90 + -90t = 90t + -90t

Combine like terms: 90t + -90t = 0
90 + -90t = 0

Add '-90' to each side of the equation.
90 + -90 + -90t = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -90t = 0 + -90
-90t = 0 + -90

Combine like terms: 0 + -90 = -90
-90t = -90

Divide each side by '-90'.
t = 1

Simplifying
t = 1