Question

the cost of a pen and a pencil is Rs.18.The price of the pen is 5times that of the pencil​

Answer 1

Answer:

let the cost of pencil be x

let the cost of pen be y

according to question

x+y=18

y=5x

x+5x=18

x=18/6

x=3

so

y=5(3)

y=15

hence cost of pen is 15

and cost of pencil is 3

Step-by-step explanation:

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Answer 2

Answer:

suppose x be the pen and y be the pencil

then,

from 1st condition,

x+y=18 ______ 1

x=5y _______ 2

we have to put x=5y in eqation 1

x+y=18

5y+y=18

6y=18

y=3

X=18-y

X=18-3

X=15

Step-by-step explanation:

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