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What is the solution of the inequality \\(9(x-1)>6x+12\\)?

Answer and explanation

Correct answer: \\(x>7\\)

Expand the brackets first: \\(9x-9>6x+12\\). Subtracting \\(6x\\) from both sides gives \\(3x-9>12\\), and adding 9 gives \\(3x>21\\). Dividing by 3 yields \\(x>7\\), so option A is correct. Option B reverses the inequality incorrectly, while options C and D include 7, which is not allowed in the strict inequality \\(>\\). Exam tip: the inequality sign changes direction only when dividing or multiplying by a negative number.

Related tags

Linear InequalitiesOne Variable InequalitiesAlgebraic SolutionStrict InequalityAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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