15h-21=47-2h

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Solution for 15h-21=47-2h equation: 



15h-21=47-2h

We move all terms to the left:

15h-21-(47-2h)=0

We add all the numbers together, and all the variables

15h-(-2h+47)-21=0

We get rid of parentheses

15h+2h-47-21=0

We add all the numbers together, and all the variables

17h-68=0

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

17h=68

h=68/17

h=4

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