9.
An
(b) If the cost of 7 pens is 560, then the costofonepenis
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Step-by-step explanation:
LER ,COST OF 1 PEN BE X..
COST OF 7 PEN = 560....
7*X= 569.
7X= 569.
X= 569/7.
X= 81.28 IS YOUR ANSWER...
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