21=h/4+18

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Solution for 21=h/4+18 equation: 



21=h/4+18

We move all terms to the left:

21-(h/4+18)=0

We get rid of parentheses

-h/4-18+21=0

We multiply all the terms by the denominator


-h-18*4+21*4=0

We add all the numbers together, and all the variables

-1h+12=0

We move all terms containing h to the left, all other terms to the right

-h=-12

h=-12/-1

h=+12

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