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nine less than a certain number


Sagot :

The answer is x - 9.

The mathematical phrase "less than" denotes subtraction. And you out the letter/variable first because the "than" in the term "less than" signifies a switch in the focus of the equation.

nine less than a certain number is written as x - 9. While when you remove the term "than", nine less a certain number becomes 9 - x.