Question

Difficulty: MediumSolving Linear Inequalities

What is the complete set of real values of xx that satisfy the inequality 342x3>2\frac{3}{4} - \frac{2x}{3} > 2?

  1. x<158x < -\frac{15}{8}Answer
  2. B
    x>158x > -\frac{15}{8}
  3. C
    x<12x < \frac{1}{2}
  4. D
    x>12x > \frac{1}{2}
  5. E
    x>24x > 24

Answer

x<158x < -\frac{15}{8}
Subtracting 34\frac{3}{4} from both sides of the inequality gives 2x3>54-\frac{2x}{3} > \frac{5}{4}. Multiplying both sides by 32-\frac{3}{2} and reversing the inequality sign from greater than (>>) to less than (<<) yields x<158x < -\frac{15}{8}.

Step-by-Step Solution

1
Subtract 34\frac{3}{4} from both sides of the inequality.
2x3>54-\frac{2x}{3} > \frac{5}{4}
To isolate the term containing the variable xx on one side of the inequality.
2
Multiply both sides of the inequality by 32-\frac{3}{2} and reverse the inequality sign.
x<158x < -\frac{15}{8}
Multiplying or dividing an inequality by a negative number requires reversing the direction of the inequality sign.

Key Concept

Solving linear inequalities by isolating the variable and applying the sign reversal rule when multiplying or dividing by a negative value.
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