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What is the solution of the inequality 2x + 5 ≤ x + 12?

Answer and explanation

Correct answer: x ≤ 7

The governing concept is collecting variable terms on one side and constants on the other without changing the inequality through addition or subtraction. From 2x + 5 ≤ x + 12, subtract x from both sides to get x + 5 ≤ 12. Next subtract 5 from both sides, giving x ≤ 7. Therefore option A is correct. Equality is included because x = 7 changes the original statement to 14 + 5 ≤ 7 + 12, or 19 ≤ 19, which is true. Options C and D wrongly exclude or reverse the boundary, whereas B gives the opposite direction. All real numbers up to and including 7 satisfy the inequality.

Related tags

Linear InequalitiesVariables On Both SidesAlgebraic SolutionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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