28=-9+4(z-3)

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Solution for 28=-9+4(z-3) equation: 



28=-9+4(z-3)

We move all terms to the left:

28-(-9+4(z-3))=0



We calculate terms in parentheses: -(-9+4(z-3)), so:

-9+4(z-3)

determiningTheFunctionDomain
4(z-3)-9

We multiply parentheses

4z-12-9

We add all the numbers together, and all the variables

4z-21

Back to the equation:

-(4z-21)



We get rid of parentheses

-4z+21+28=0

We add all the numbers together, and all the variables

-4z+49=0

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

-4z=-49

z=-49/-4

z=12+1/4

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