3p+15=21

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Solution for 3p+15=21 equation: 



3p+15=21

We move all terms to the left:

3p+15-(21)=0

We add all the numbers together, and all the variables

3p-6=0

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

3p=6

p=6/3

p=2

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