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

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

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Isabella 1 month 2021-08-16T06:43:22+00:00 1 Answers 0 views 0

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    2021-08-16T06:44:55+00:00

    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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