8h-9=6h+21=

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Solution for 8h-9=6h+21= equation: 



8h-9=6h+21=

We move all terms to the left:

8h-9-(6h+21)=0

We get rid of parentheses

8h-6h-21-9=0

We add all the numbers together, and all the variables

2h-30=0

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

2h=30

h=30/2

h=15

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