42=3.2-3h

Solution for 42=3.2-3h equation:

Simplifying
42 = 3.2 + -3h

Solving
42 = 3.2 + -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 = 3.2 + -3h + 3h

Combine like terms: -3h + 3h = 0
42 + 3h = 3.2 + 0
42 + 3h = 3.2

Add '-42' to each side of the equation.
42 + -42 + 3h = 3.2 + -42

Combine like terms: 42 + -42 = 0
0 + 3h = 3.2 + -42
3h = 3.2 + -42

Combine like terms: 3.2 + -42 = -38.8
3h = -38.8

Divide each side by '3'.
h = -12.93333333

Simplifying
h = -12.93333333