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7p+3.8=9.4
We move all terms to the left:
7p+3.8-(9.4)=0
We add all the numbers together, and all the variables
7p-5.6=0
We move all terms containing p to the left, all other terms to the right
7p=5.6
p=5.6/7
p=3.5/4.375
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