(5z-21=)

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Solution for (5z-21=) equation: 



(5z-21=)

We move all terms to the left:

(5z-21-())=0



We calculate terms in parentheses: +(5z-21-()), so:

5z-21-()

We add all the numbers together, and all the variables

5z

Back to the equation:

+(5z)



z=0/5

z=0

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