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

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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