Question

The sum of a number and 6 is 15.The number is
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Answer 1

Answer:

the sum of a number and 6 is at least 15"

                    x     +             6      ≥        15

 

     x ≥ 9         [subtract 6 from both sides retains sense of inequality]

 

To check:

    Adding any number greater than or equal to 9 to the number 6 produces a result at least 15.  Any number less than 9 produces a result that is not at