13h+42=81

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Solution for 13h+42=81 equation: 



13h+42=81

We move all terms to the left:

13h+42-(81)=0

We add all the numbers together, and all the variables

13h-39=0

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

13h=39

h=39/13

h=3

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