10

Set 6: Linear Inequalities (Intermediate)

Explanation

Answer: C

If 6x523x+134>10\frac{6x-5}{2} - \frac{3x+13}{4} > 10, what is the solution?

A.

x>3x > 3

B.

x<3x < 3

C.

x>7x > 7

✓ Correct
D.

x<7x < 7

Detailed Explanation

Choice C is correct. Choice C is the correct answer. Inequalities with multiple fractions require finding a common denominator. 1. LCD is 4: Rewrite as 2(6x5)43x+134>10\frac{2(6 x-5)}{4} - \frac{3 x+13}{4} > 10 2. Combine fractions: 12x103x134>10\frac{12 x-10-3 x-13}{4} > 10, giving 9x234>10\frac{9 x-23}{4} > 10 3. Multiply by 4: 9x23>409x - 23 > 40 4. Add 23: 9x>639x > 63 5. Divide by 9: x>7x > 7 Strategic Tip: When working with multiple fractions, find the LCD (Least Common Denominator) to combine fractions efficiently. Choice A is incorrect because it represents x>3x > 3, which comes from solving with incorrect arithmetic. Choice B is incorrect because it both uses the wrong value and reverses the inequality direction. Choice D is incorrect because while 7 is the correct boundary, the direction should be >>, not <<.

Key Steps:

The correct answer is x>7x > 7

Why others are wrong:
A: Choice A is incorrect and may result from a calculation error.
B: Choice B is incorrect and may result from a calculation error.
D: Choice D is incorrect and may result from a calculation error.

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