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If (7x-2(3x+5)\ge 4) and (\frac{x-1}{2}>3), what is the combined solution?

Answer and explanation

Correct answer: \(x\ge 14\)

In the first inequality, \(7x-2(3x+5)=7x-6x-10=x-10\). Thus, \(x-10\ge4\), so \(x\ge14\). From the second inequality, \(x-1>6\), giving \(x>7\). Since both conditions must hold, take the intersection of the two solution sets: \(x\ge14\). The option \(x>7\) satisfies only the second inequality. Exam tip: for “and,” always take the intersection of the solution sets.

Related tags

Linear InequalitiesOne VariableSolution SetIntersectionAlgebraClass 11Algebraic Solution Of Linear Inequalities In One VariableMathematics

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