Cost of 3 pencil and 5 pens is 14 cost of 12 pencil and 20 pens

1 thought on “Cost of 3 pencil and 5 pens is 14 cost of 12 pencil and 20 pens”

1. Answer:

   Rs. 56 is the cost of 12 pencils and 20 pens.

   Step-by-step explanation:

   Let x be the cost of 1 pencil.

   Let y be the cost of 1 pen.

   So,

   3x + 5y = 14 (Equation 1)

   By multiplying both sides with 4, we get,

   12x + 20y = 56 (Equation 2)

   Now, if you observe Equation 2 carefully, you’ll see it implies the cost of 12 pencils and 20 pens.

   Thus the cost of 12 pencils and 20 pens is Rs. 56.

   *The value of an equation doesn’t change when equal no.s are multiplied/added/subtracted/or divided with on both sides.

   Hope you’ll understand it.

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