Question

The sum of pens and pencils are 25 Rs.if the pens cost are exceeds by the 9 Rs. Find the cost of pens and pencils.

Answer 1

Answer:

given below

Step-by-step explanation:

cost of pencil=x

cost of pen=x+9

total cost =25

25=x+x+9

2x+9=25

2x=25-9

2x=16

x=16/2

x=8

∴cost of pencil=rs.8 and cost of pen=rs.17

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Answer 2

Answer

Step-by-step explanation:

Let the cost of pens be x and cost of pencils be y

x+y=25 - eq 1

x=9+y - eq 2

Substituting eq 2 in eq 1 we get

9+y+y=25

9+2y=25

2y=25-9

   =16

y=16/2

  =8

x=9+y

  =9+8

   =17

Therefore, cost of pens is 17 Rs and cost pencils is 8 Rs