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Which is the solution of ( 12-3(2x+1)\leq x-5 )?

Answer and explanation

Correct answer: \(x\geq 2\)

Simplifying the left-hand side gives \(12-3(2x+1)=12-6x-3=9-6x\). Thus, \(9-6x\leq x-5\), which gives \(14\leq 7x\). Dividing by 7 gives \(x\geq 2\), so option A is correct. The option \(x>2\) incorrectly excludes \(x=2\), which satisfies the inequality. Exam tip: the inequality sign does not change when dividing by a positive number.

Related tags

Linear InequalitiesOne VariableAlgebraic SolutionBracketsInequality SolvingAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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