8.1=3(b)(1.5)

Solution for 8.1=3(b)(1.5) equation:

Simplifying
8.1 = 3(b)(1.5)

Reorder the terms for easier multiplication:
8.1 = 3 * 1.5b

Multiply 3 * 1.5
8.1 = 4.5b

Solving
8.1 = 4.5b

Solving for variable 'b'.

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

Add '-4.5b' to each side of the equation.
8.1 + -4.5b = 4.5b + -4.5b

Combine like terms: 4.5b + -4.5b = 0.0
8.1 + -4.5b = 0.0

Add '-8.1' to each side of the equation.
8.1 + -8.1 + -4.5b = 0.0 + -8.1

Combine like terms: 8.1 + -8.1 = 0.0
0.0 + -4.5b = 0.0 + -8.1
-4.5b = 0.0 + -8.1

Combine like terms: 0.0 + -8.1 = -8.1
-4.5b = -8.1

Divide each side by '-4.5'.
b = 1.8

Simplifying
b = 1.8