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Solve the inequality \(5(2x+1)-3x<26\).

Answer and explanation

Correct answer: x < 3

Expanding the brackets gives \(10x+5-3x<26\). Combining like terms, \(7x+5<26\), so \(7x<21\). Dividing by the positive number 7 gives \(x<3\), making option B correct. Option C, \(x≤3\), is incorrect because the original inequality is strict; \(x=3\) does not satisfy it. Exam tip: reverse the inequality sign only when multiplying or dividing by a negative number; since 7 is positive here, the sign remains unchanged.

Related tags

Linear InequalitiesAlgebraic SimplificationInequality SymbolsAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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