Find the student’s error in solving the following inequality.31 < –5x + 6 25 < –5x –5 < x

Subtracting 6 from both sides gives 25 < –5x. When you divide an inequality by a negative number, you must reverse the inequality sign, so dividing by –5 gives –5 > x, or x < –5. The student’s error was leaving the inequality sign pointing the same way; choice C identifies this error.

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