21-2p=5

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Solution for 21-2p=5 equation: 



21-2p=5

We move all terms to the left:

21-2p-(5)=0

We add all the numbers together, and all the variables

-2p+16=0

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

-2p=-16

p=-16/-2

p=+8

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