Question

if the cost of 2 pencils and 3 pens are Rs 46 and 3 pencils and 5 are Rs 74 then find the cost of 1 pencil and 1 pen each​

Answer 1

Answer:

Step-by-step explanation:

let the cost of pencil be-X

let the cost of pens be-Y

THEREFORE,-     2X+3Y=46.......-eq1

                          3X+5Y=74.........-eq2

BY SUBSTITUTION METHOD,

x=74-5Y........ putting the value of in eq 1 we get,

        3

y=10

and putting the value of y in above eq we get,

X=74-5(10)

        3

X=8

THEREFORE the cost of one pencil  is 8rs

                      the cost of one pen is 10 rs

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