80=3x*3x*5

Solution for 80=3x*3x*5 equation:

Simplifying
80 = 3x * 3x * 5

Reorder the terms for easier multiplication:
80 = 3 * 3 * 5x * x

Multiply 3 * 3
80 = 9 * 5x * x

Multiply 9 * 5
80 = 45x * x

Multiply x * x
80 = 45x2

Solving
80 = 45x2

Solving for variable 'x'.

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

Add '-45x2' to each side of the equation.
80 + -45x2 = 45x2 + -45x2

Combine like terms: 45x2 + -45x2 = 0
80 + -45x2 = 0

Add '-80' to each side of the equation.
80 + -80 + -45x2 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -45x2 = 0 + -80
-45x2 = 0 + -80

Combine like terms: 0 + -80 = -80
-45x2 = -80

Divide each side by '-45'.
x2 = 1.777777778

Simplifying
x2 = 1.777777778

Take the square root of each side:
x = {-1.333333333, 1.333333333}