Inequalities Answers

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

The student should have added 6 to both sides instead of subtracting it.

The student divided 25/–5 incorrectly.

The student should have switched the direction of the inequality sign to get –5> x for a final answer.

Find the student’s error in solving the following inequality.2 x > –5/3

The student should have added 4 to all parts (left, middle, and right) to get 6 < –3x < 9.

The student divided 6/–3 incorrectly.

The student should not have switched the direction of the sign in the final step.

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