H+(H-6)=30

Solution for H+(H-6)=30 equation:

Simplifying
H + (H + -6) = 30

Reorder the terms:
H + (-6 + H) = 30

Remove parenthesis around (-6 + H)
H + -6 + H = 30

Reorder the terms:
-6 + H + H = 30

Combine like terms: H + H = 2H
-6 + 2H = 30

Solving
-6 + 2H = 30

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 + 2H = 30 + 6

Combine like terms: -6 + 6 = 0
0 + 2H = 30 + 6
2H = 30 + 6

Combine like terms: 30 + 6 = 36
2H = 36

Divide each side by '2'.
H = 18

Simplifying
H = 18