A money box contains only 10-cent and 20-cent coins. There are 33 coins with a total value of $4.60. How many coins of eac

Question

A money box contains only 10-cent
and 20-cent coins. There are 33
coins with a total value of $4.60.
How many coins of each?

in progress 0
Tryphena 4 years 2021-09-01T00:46:19+00:00 2 Answers 30 views 0

Answers ( )

  1. trungdung22
    1
    2021-09-01T00:47:28+00:00
    Reply

    Answer:

    Below in bold.

    Step-by-step explanation:

    x + y = 33      where x = 10 cent coin and y = 20 cent coin

    10x + 20y = 460

    Multiply first equation by 10:

    10x + 10y = 330

    Subtract this from the second equation:

    10y = 130

    y = 13

    So there are 13 20c coins

    and 33 – 13 = 20 10c coins.

  2. thaiduong
    1
    2021-09-01T00:47:40+00:00
    Reply

    20 ten cents and 13 twenty cents
    This is a real logic problem you just need to trial and error

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