7h-12=18-3h

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Solution for 7h-12=18-3h equation: 



7h-12=18-3h

We move all terms to the left:

7h-12-(18-3h)=0

We add all the numbers together, and all the variables

7h-(-3h+18)-12=0

We get rid of parentheses

7h+3h-18-12=0

We add all the numbers together, and all the variables

10h-30=0

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

10h=30

h=30/10

h=3

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