math

posted by lily

The sum of two decimal numbers is 5.3. Their differences is 1.7, and their product is 6.3. what are the two numbers?

  1. David Q/R

    x + y = 5.3
    x - y = 1.7
    So add the equations together:
    2x = 7.0
    x = 3.5
    But x + y = 5.3, so
    y = 1.8
    Check it: x times y = 6.3. Correct!

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