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4.20+40p=1.12
We move all terms to the left:
4.20+40p-(1.12)=0
We add all the numbers together, and all the variables
40p+3.08=0
We move all terms containing p to the left, all other terms to the right
40p=-3.08
p=-3.08/40
p=-2.85185185185/37.037037037
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