30*3+(h*42)=390

Solution for 30*3+(h*42)=390 equation:

Simplifying
30 * 3 + (h * 42) = 390

Multiply 30 * 3
90 + (h * 42) = 390

Reorder the terms for easier multiplication:
90 + (42h) = 390

Solving
90 + (42h) = 390

Solving for variable 'h'.

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

Add '-90' to each side of the equation.
90 + -90 + (42h) = 390 + -90

Combine like terms: 90 + -90 = 0
0 + (42h) = 390 + -90
(42h) = 390 + -90

Combine like terms: 390 + -90 = 300
(42h) = 300

Divide each side by '42'.
h = 7.142857143

Simplifying
h = 7.142857143