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Choose the solution set of 2(3x − 1) − 5 ≥ 4x + 7.

Answer and explanation

Correct answer: x ≥ 7

The governing rule is that equivalent operations may be performed on both sides of a linear inequality, while the sign reverses only when multiplying or dividing by a negative number. Expand the left side: 2(3x − 1) − 5 = 6x − 2 − 5 = 6x − 7. Thus 6x − 7 ≥ 4x + 7. Subtract 4x from both sides to obtain 2x − 7 ≥ 7, then add 7: 2x ≥ 14. Division by the positive number 2 gives x ≥ 7, so option C is correct. The value 7 is included because the original relation is ≥. Option A reverses the direction, option B has an incorrect boundary, and option D wrongly excludes 7.

Related tags

Linear InequalitiesBracketsSolution SetAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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