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2.5p+7=13.4
We move all terms to the left:
2.5p+7-(13.4)=0
We add all the numbers together, and all the variables
2.5p-6.4=0
We move all terms containing p to the left, all other terms to the right
2.5p=6.4
p=6.4/2.5
p=2+1/1.78571428571
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