9
algebra

If 5x103>5\frac{5x - 10}{3} > 5, what is the solution?

A

x>5x > 5

B

x<5x < 5

C

x>7x > 7

D

x<7x < 7

Correct Answer: A

Choice A is the correct answer. Clear fractions first, then solve the resulting inequality.

  1. Multiply by 3: 35x103>353 \cdot \frac{5x-10}{3} > 3 \cdot 5, giving 5x10>155x - 10 > 15
  2. Add 10: 5x>255x > 25
  3. Divide by 5: x>5x > 5

?�� Strategic Tip: Multiplying both sides by the denominator (when positive) eliminates fractions without changing inequality direction.

Choice B is incorrect because it reverses the inequality without justification. Choice C is incorrect because it might come from adding 10 and 15 to get 25, then dividing by something other than 5. Choice D is incorrect because it combines wrong value (7) with wrong direction.