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14 February, 16:42

Frankie buys some stamps.

She spends £9.90 on 20p and 50p stamps.

She buys twice as many 20p stamps

as 50p stamps.

How many 20p stamps did she buy?

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Answers (1)
  1. 14 February, 17:56
    0
    22

    Step-by-step explanation:

    £9.90 = 990p

    x is number of 50p stamps

    2x * 20 + x * 50 = 990

    40x+50x = 990

    90x = 990

    x = 11

    2x = 22

    11 50p stamps

    22 20p stamps

    check:

    11*50+22*20 = 550 + 440 = 990
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