9h=2h-21

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Solution for 9h=2h-21 equation: 


Simplifying
9h = 2h + -21

Reorder the terms:
9h = -21 + 2h

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

Combine like terms: 9h + -2h = 7h
7h = -21 + 2h + -2h

Combine like terms: 2h + -2h = 0
7h = -21 + 0
7h = -21

Divide each side by '7'.
h = -3

Simplifying
h = -3

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