20=5(z-9)

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Solution for 20=5(z-9) equation: 



20=5(z-9)

We move all terms to the left:

20-(5(z-9))=0



We calculate terms in parentheses: -(5(z-9)), so:

5(z-9)

We multiply parentheses

5z-45

Back to the equation:

-(5z-45)



We get rid of parentheses

-5z+45+20=0

We add all the numbers together, and all the variables

-5z+65=0

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

-5z=-65

z=-65/-5

z=+13

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