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Choose the correct conclusion for (\frac{2x+3}{5}-\frac{x-4}{2}\le\frac{7-x}{10}).

Answer and explanation

Correct answer: no solution

The governing rule is that an inequality with rational expressions can be solved by multiplying by a positive common denominator; because the multiplier is positive, the inequality sign does not change. The least common denominator is 10. Thus 10 times the left side is 2(2x+3)-5(x-4)=4x+6-5x+20=26-x, while the right side becomes 7-x. Therefore 26-x\le7-x, and adding x to both sides gives 26\le7, which is false. The variable cancels completely, so no real value of x can satisfy the statement. Hence option C is correct. Option A would require an identity, option B or D would require a genuine interval, but the resulting contradiction gives an empty solution set.

Related tags

Linear InequalitiesClass 11One VariableEmpty SolutionAlgebraic Solution Of Linear Inequalities In One VariableMathematicsClass 11 Mcq

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