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17 May, 03:46

The sum of two rational numbers of 63, and their difference is 12? What are the numbers?

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Answers (1)
  1. 17 May, 06:11
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    The two numbers are 37.5 and 25.5

    Step-by-step explanation:

    Comment

    Let the two numbers be x and y

    Equations

    x + y = 63

    x - y = 12

    Solution

    Add the two equations. The ys cancel out.

    2x = 75 Divide by 2

    2x/2 = 75/3 Do the division

    x = 37.5

    Now use one of the given equations to solve for y

    x + y = 63

    x = 37.5

    37.5 + y = 63 Subtract 37.5 from both sides

    37.5-37.5+y = 63 - 37.5 Collect the like terms on both sides

    y = 25.5

    Check

    x - y = ? 12

    37.5-25.5 = ? 12

    12 = 12
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