3p-7p=28

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Solution for 3p-7p=28 equation: 



3p-7p=28

We move all terms to the left:

3p-7p-(28)=0

We add all the numbers together, and all the variables

-4p-28=0

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

-4p=28

p=28/-4

p=-7

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