42=3(2-4h)

Solution for 42=3(2-4h) equation:

Simplifying
42 = 3(2 + -4h)
42 = (2 * 3 + -4h * 3)
42 = (6 + -12h)

Solving
42 = 6 + -12h

Solving for variable 'h'.

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

Add '12h' to each side of the equation.
42 + 12h = 6 + -12h + 12h

Combine like terms: -12h + 12h = 0
42 + 12h = 6 + 0
42 + 12h = 6

Add '-42' to each side of the equation.
42 + -42 + 12h = 6 + -42

Combine like terms: 42 + -42 = 0
0 + 12h = 6 + -42
12h = 6 + -42

Combine like terms: 6 + -42 = -36
12h = -36

Divide each side by '12'.
h = -3

Simplifying
h = -3