3p-84=-4p

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Solution for 3p-84=-4p equation: 



3p-84=-4p

We move all terms to the left:

3p-84-(-4p)=0

We get rid of parentheses

3p+4p-84=0

We add all the numbers together, and all the variables

7p-84=0

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

7p=84

p=84/7

p=12

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