42=.5b(12)

Solution for 42=.5b(12) equation:

Simplifying
42 = 0.5b(12)

Reorder the terms for easier multiplication:
42 = 0.5 * 12b

Multiply 0.5 * 12
42 = 6b

Solving
42 = 6b

Solving for variable 'b'.

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

Add '-6b' to each side of the equation.
42 + -6b = 6b + -6b

Combine like terms: 6b + -6b = 0
42 + -6b = 0

Add '-42' to each side of the equation.
42 + -42 + -6b = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -6b = 0 + -42
-6b = 0 + -42

Combine like terms: 0 + -42 = -42
-6b = -42

Divide each side by '-6'.
b = 7

Simplifying
b = 7