30-5z=5(z-4)

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Solution for 30-5z=5(z-4) equation: 



30-5z=5(z-4)

We move all terms to the left:

30-5z-(5(z-4))=0



We calculate terms in parentheses: -(5(z-4)), so:

5(z-4)

We multiply parentheses

5z-20

Back to the equation:

-(5z-20)



We get rid of parentheses

-5z-5z+20+30=0

We add all the numbers together, and all the variables

-10z+50=0

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

-10z=-50

z=-50/-10

z=+5

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