5h-2(3+4h)=21

Solution for 5h-2(3+4h)=21 equation:

Simplifying
5h + -2(3 + 4h) = 21
5h + (3 * -2 + 4h * -2) = 21
5h + (-6 + -8h) = 21

Reorder the terms:
-6 + 5h + -8h = 21

Combine like terms: 5h + -8h = -3h
-6 + -3h = 21

Solving
-6 + -3h = 21

Solving for variable 'h'.

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

Add '6' to each side of the equation.
-6 + 6 + -3h = 21 + 6

Combine like terms: -6 + 6 = 0
0 + -3h = 21 + 6
-3h = 21 + 6

Combine like terms: 21 + 6 = 27
-3h = 27

Divide each side by '-3'.
h = -9

Simplifying
h = -9