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30p-55=19p-99
We move all terms to the left:
30p-55-(19p-99)=0
We get rid of parentheses
30p-19p+99-55=0
We add all the numbers together, and all the variables
11p+44=0
We move all terms containing p to the left, all other terms to the right
11p=-44
p=-44/11
p=-4
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