42=3(2-h)

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

Simplifying
42 = 3(2 + -1h)
42 = (2 * 3 + -1h * 3)
42 = (6 + -3h)

Solving
42 = 6 + -3h

Solving for variable 'h'.

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

Add '3h' to each side of the equation.
42 + 3h = 6 + -3h + 3h

Combine like terms: -3h + 3h = 0
42 + 3h = 6 + 0
42 + 3h = 6

Add '-42' to each side of the equation.
42 + -42 + 3h = 6 + -42

Combine like terms: 42 + -42 = 0
0 + 3h = 6 + -42
3h = 6 + -42

Combine like terms: 6 + -42 = -36
3h = -36

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

Simplifying
h = -12