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Solve the inequality (6x-1\ge 2(2x+7)).

Answer and explanation

Correct answer: (x\ge \frac{15}{2})

The direct answer is option D: \(x\ge\frac{15}{2}\). Expand the right side: \(2(2x+7)=4x+14\). Thus \(6x-1\ge4x+14\). Subtract \(4x\): \(2x-1\ge14\). Add 1: \(2x\ge15\). Divide by positive 2, so the inequality sign stays the same: \(x\ge15/2\). Option A reverses the direction and has the wrong boundary. Option B uses a strict greater-than sign, although equality is allowed. Option C has the wrong numerator, 13 instead of 15. Option D includes equality and has the correct value. Sign reversal is needed only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesVariable Both SidesBrackets

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