8p-21=5p

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Solution for 8p-21=5p equation: 



8p-21=5p

We move all terms to the left:

8p-21-(5p)=0

We add all the numbers together, and all the variables

3p-21=0

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

3p=21

p=21/3

p=7

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