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What is the solution of 8 + 2x ≤ 20?

Answer and explanation

Correct answer: x ≤ 6

The governing concept is solving a one-variable linear inequality while preserving its direction. Begin with 8 + 2x ≤ 20. Subtract 8 from both sides to isolate the variable term: 2x ≤ 12. Divide both sides by the positive number 2, obtaining x ≤ 6. Since the divisor is positive, the inequality sign remains unchanged; therefore option A is correct. Option B reverses the sign incorrectly. Options C and D use 14, which comes from subtracting in the wrong direction or failing to simplify the variable coefficient. Checking the boundary value x = 6 gives 8 + 12 = 20, and a smaller value such as x = 0 gives 8 ≤ 20, confirming the solution region.

Related tags

Linear InequalitiesTwo-Step InequalityAlgebraic MethodClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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