Question

Represent the following using an algebraic expression:

Total value of the purchase of 3 pens, each for Rs x, and 4

Pencils, each Rs y.

plz answer in steps ​

Answer 1

Answer:

Let the cost price of one pen =x

Let the cost price of one pencil=y

According to the problem,

Aseem's total cost price =3x+5y=40

Manik's total cost price =5x+4y=58

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Answer 2

Answer:

Let the cost of a pen and a pencil be x and y respectively.

4x+4y=100

x+y=25 ...(1)

3x=y+15

3x−y=15 ...(2)

Adding (1) and (2), we get

4x=40

x=10

Substitute x=10 in equation (1) to get y=15.