20-19h-19h=-3(15h+15)-19

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Solution for 20-19h-19h=-3(15h+15)-19 equation: 



20-19h-19h=-3(15h+15)-19

We move all terms to the left:

20-19h-19h-(-3(15h+15)-19)=0

We add all the numbers together, and all the variables

-38h-(-3(15h+15)-19)+20=0



We calculate terms in parentheses: -(-3(15h+15)-19), so:

-3(15h+15)-19

We multiply parentheses

-45h-45-19

We add all the numbers together, and all the variables

-45h-64

Back to the equation:

-(-45h-64)



We get rid of parentheses

-38h+45h+64+20=0

We add all the numbers together, and all the variables

7h+84=0

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

7h=-84

h=-84/7

h=-12

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