20h+-9h-h-12h=-h=12

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Solution for 20h+-9h-h-12h=-h=12 equation: 



20h+-9h-h-12h=-h=12

We move all terms to the left:

20h+-9h-h-12h-(-h)=0

We add all the numbers together, and all the variables

20h-9h-h-12h-(-1h)+=0

We add all the numbers together, and all the variables

-2h-(-1h)=0

We get rid of parentheses

-2h+1h=0

We add all the numbers together, and all the variables

-h=0

h=0/-1

h=0

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