(5z+1)=21

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Solution for (5z+1)=21 equation: 



(5z+1)=21

We move all terms to the left:

(5z+1)-(21)=0

We get rid of parentheses

5z+1-21=0

We add all the numbers together, and all the variables

5z-20=0

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

5z=20

z=20/5

z=4

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