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Which is the correct order to solve 2x + 3 ≤ 15?

Answer and explanation

Correct answer: Subtract 3 then divide by 2

The governing concept is undoing operations in reverse order. In 2x + 3 ≤ 15, the addition of 3 is the outer operation applied after multiplication by 2. Therefore first subtract 3 from both sides: 2x + 3 − 3 ≤ 15 − 3, giving 2x ≤ 12. Next divide both sides by the positive number 2, obtaining x ≤ 6. Thus option A gives the correct order and the correct solution. Option B moves farther from isolating x by adding 3. Option C divides before removing the added constant and does not correctly undo the expression as written. Option D applies unrelated operations. Because the divisor is positive, the inequality sign remains ≤.

Related tags

Linear InequalitiesSolving StepsInverse OperationsOrder Of OperationsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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