3
algebra

Solve: 3x5>73x - 5 > 7 or 2x+1<32x + 1 < -3

A

x>4x > 4 or x<2x < -2

B

x>4x > 4 or x<1x < -1

C

4<x<24 < x < -2

D

x>2x > 2 or x<2x < -2

Correct Answer: A

Choice A is the correct answer. Solve each inequality separately.

  1. First Inequality: 3x5>73x>12x>43x - 5 > 7 \rightarrow 3x > 12 \rightarrow x > 4
  2. Second Inequality: 2x+1<32x<4x<22x + 1 < -3 \rightarrow 2x < -4 \rightarrow x < -2
  3. Combine: x>4x > 4 or x<2x < -2

?�� Strategic Tip: Solve them independently. The solution is the union of both sets.

Choice B is incorrect because it solves the second inequality incorrectly (2x<2x<12x < -2 \rightarrow x < -1). Choice C is incorrect because it tries to write it as a compound "and" inequality, which is impossible (no number is both >4>4 and <2<-2). Choice D is incorrect because it solves the first inequality incorrectly.