12h+9h=84

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Solution for 12h+9h=84 equation: 


Simplifying
12h + 9h = 84

Combine like terms: 12h + 9h = 21h
21h = 84

Solving
21h = 84

Solving for variable 'h'.

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

Divide each side by '21'.
h = 4

Simplifying
h = 4

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