72-9z=3(z-4)

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Solution for 72-9z=3(z-4) equation: 



72-9z=3(z-4)

We move all terms to the left:

72-9z-(3(z-4))=0



We calculate terms in parentheses: -(3(z-4)), so:

3(z-4)

We multiply parentheses

3z-12

Back to the equation:

-(3z-12)



We get rid of parentheses

-9z-3z+12+72=0

We add all the numbers together, and all the variables

-12z+84=0

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

-12z=-84

z=-84/-12

z=+7

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