21=2h-18

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Solution for 21=2h-18 equation:


Simplifying
21 = 2h + -18

Reorder the terms:
21 = -18 + 2h

Solving
21 = -18 + 2h

Solving for variable 'h'.

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

Add '-2h' to each side of the equation.
21 + -2h = -18 + 2h + -2h

Combine like terms: 2h + -2h = 0
21 + -2h = -18 + 0
21 + -2h = -18

Add '-21' to each side of the equation.
21 + -21 + -2h = -18 + -21

Combine like terms: 21 + -21 = 0
0 + -2h = -18 + -21
-2h = -18 + -21

Combine like terms: -18 + -21 = -39
-2h = -39

Divide each side by '-2'.
h = 19.5

Simplifying
h = 19.5

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