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7*0.5+5-8*0.25=p
We move all terms to the left:
7*0.5+5-8*0.25-(p)=0
We add all the numbers together, and all the variables
-1p+6.5=0
We move all terms containing p to the left, all other terms to the right
-p=-6.5
p=-6.5/-1
p=6+0.5/1
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