Question

Two pens and one eraser cost RS. 35 and 3 pencil and 4 eraser cost Rs.65find the cost of pencil and eraser separately? ​

Answer 1

Step-by-step explanation:

let,no.of pencils=x

no.of erasers=y

2x+y=35---(1)

3x+4y=65--(2)

(1).3-(2).2

6x+3y=105

6x+8y=130

------------------

-5y=-25

5y=25

y=5

x=35-5/2=15

therefore,no.of pens are 15 and no.of erasers are 5.

Answer 2

Answer:

et X be no.of pencils

Let Y be no.of pens

Let Z be no.of erasers

Given

X+2Y+4Z=22

5X+4Y+2Z=32

The cost of 3 pencils, 3 pens and 3 erasers is

(X+2Y+4Z)+(5X+4Y+2Z) =22+32

6X+6Y+6Z=54

2(3X+3Y+3Z)=54

3X+3Y+3Z=(54/2)

3X+3Y+3Z=27

So the required answer is 27 !!!

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