-81=-45-9h

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Solution for -81=-45-9h equation: 



-81=-45-9h

We move all terms to the left:

-81-(-45-9h)=0

We add all the numbers together, and all the variables

-(-9h-45)-81=0

We get rid of parentheses

9h+45-81=0

We add all the numbers together, and all the variables

9h-36=0

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

9h=36

h=36/9

h=4

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