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p/2+-2=-1
We move all terms to the left:
p/2+-2-(-1)=0
We add all the numbers together, and all the variables
p/2-1=0
We multiply all the terms by the denominator
p-1*2=0
We add all the numbers together, and all the variables
p-2=0
We move all terms containing p to the left, all other terms to the right
p=2
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