7p-84=3p

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Solution for 7p-84=3p equation: 



7p-84=3p

We move all terms to the left:

7p-84-(3p)=0

We add all the numbers together, and all the variables

4p-84=0

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

4p=84

p=84/4

p=21

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