9
algebra

If x42=5\frac{x}{4} - 2 = 5, what is the value of xx?

A

12

B

7

C

1.75

D

28

Correct Answer: D

Choice Choice D is the correct answer.

  1. Start with the equation: x42=5\frac{x}{4} - 2 = 5
  2. Add 2 to both sides: x4=5+2\frac{x}{4} = 5 + 2
  3. Simplify: x4=7\frac{x}{4} = 7
  4. Multiply both sides by 4: x=7×4x = 7 \times 4
  5. Simplify: x=28x = 28
  6. Verify: 2842=72=5\frac{28}{4} - 2 = 7 - 2 = 5

Choice Choice A is incorrect because this results from subtracting 2 from 5: 33, then multiplying by 4: 1212. Wrong inverse operation.

Choice Choice B is incorrect because this is the value of x4\frac{x}{4}. You must multiply by 4.

Choice Choice C is incorrect because this results from dividing 7 by 4: 1.751.75. We need to multiply.