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Posted by on Monday, February 13, 2012 at 5:27pm.

Please show me how to set and solve:

The sum of two numbers is 90. Their difference is 12. What are the numbers?

  • Math - , Monday, February 13, 2012 at 6:06pm

    x + (x-12) = 90
    2x = 102
    x = 51

    the two numbers are 39 and 51

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