21=2h+9

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Solution for 21=2h+9 equation:


Simplifying
21 = 2h + 9

Reorder the terms:
21 = 9 + 2h

Solving
21 = 9 + 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 = 9 + 2h + -2h

Combine like terms: 2h + -2h = 0
21 + -2h = 9 + 0
21 + -2h = 9

Add '-21' to each side of the equation.
21 + -21 + -2h = 9 + -21

Combine like terms: 21 + -21 = 0
0 + -2h = 9 + -21
-2h = 9 + -21

Combine like terms: 9 + -21 = -12
-2h = -12

Divide each side by '-2'.
h = 6

Simplifying
h = 6

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