price of book was reduced by 20% sold at 280 how much must the video be sold to earn profit of 30%

please explain how you worked it out in detail

thanx
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1 Answer

???????????? book or video ?????????????

x-20%=280...that meen 80% av x=280

& that meen 0.8 x=280

so x=280/0.8=350

????????????????????????? "profit av 30%" ?????????

yu gotta giv us the KOST
by

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