1
algebra

Solve: 2(3x4)10-2(3x - 4) \leq 10

A

x13x \geq -\frac{1}{3}

B

x13x \leq -\frac{1}{3}

C

x13x \geq \frac{1}{3}

D

x13x \leq \frac{1}{3}

Correct Answer: A

Choice A is the correct answer. Distributing negative coefficients requires careful sign tracking.

  1. Distribute: 2(3x)2(4)10-2(3x) - 2(-4) \leq 10, giving 6x+810-6x + 8 \leq 10
  2. Subtract 8: 6x2-6x \leq 2
  3. Divide by -6: x26=13x \geq -\frac{2}{6} = -\frac{1}{3} (REVERSE!)

?�� Strategic Tip: When distributing a negative, every term inside changes sign. Then dividing by negative reverses the inequality.

Choice B is incorrect because it fails to reverse the inequality when dividing by -6. Choice C is incorrect because it has the wrong sign on the fraction (should be negative). Choice D is incorrect because it combines wrong sign and wrong direction.