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5p-21=2p+33
We move all terms to the left:
5p-21-(2p+33)=0
We get rid of parentheses
5p-2p-33-21=0
We add all the numbers together, and all the variables
3p-54=0
We move all terms containing p to the left, all other terms to the right
3p=54
p=54/3
p=18
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