2p-1=21

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Solution for 2p-1=21 equation: 



2p-1=21

We move all terms to the left:

2p-1-(21)=0

We add all the numbers together, and all the variables

2p-22=0

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

2p=22

p=22/2

p=11

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