Question

a pen costs rupees 3x . the total cost of 5y such pens is
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Answer 1

Answer:

₹ 15xy

Step-by-step explanation:

Cost of 5y pens

$= 5y \times 3x \\ \\ =₹ 15xy$

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Answer obtained respectively.

Answer 2

Answer:

15xy

Step-by-step explanation:

Cost of 1 pen = 3x

Cost of 5y pens = 3x*5y

                           = 15xy