Five times a number decreased by nine is equal to twice the number increased by 23. Which equation could be used to solve the problem?

Let x represent the number. “Five times a number decreased by nine” is 5x − 9, and “twice the number increased by 23” is 2x + 23. Since the two quantities are equal, the equation is 5x − 9 = 2x + 23, which is choice B.

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