-6h+21=12h-15

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Solution for -6h+21=12h-15 equation: 



-6h+21=12h-15

We move all terms to the left:

-6h+21-(12h-15)=0

We get rid of parentheses

-6h-12h+15+21=0

We add all the numbers together, and all the variables

-18h+36=0

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

-18h=-36

h=-36/-18

h=+2

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