2z+5=21

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Solution for 2z+5=21 equation: 



2z+5=21

We move all terms to the left:

2z+5-(21)=0

We add all the numbers together, and all the variables

2z-16=0

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

2z=16

z=16/2

z=8

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