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0.75p=0.4=100
We move all terms to the left:
0.75p-(0.4)=0
We add all the numbers together, and all the variables
0.75p-0.4=0
We move all terms containing p to the left, all other terms to the right
0.75p=0.4
p=0.4/0.75
p=0.4/0.75
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