8

Set 5: Trigonometry

Explanation

Answer: D

If 6x+18=1086x + 18 = 108, what is the value of xx?

A.

5

B.

25

C.

7

D.

15

✓ Correct

Detailed Explanation

Choice D is correct. 1. Start: 6x+18=1086x + 18 = 108 Subtract 18: 6x=906x = 90 Divide by 6: x=15x = 15 Therefore, x=15x = 15.

Key Steps:

Apply the appropriate mathematical formula

The correct answer is 15

Why others are wrong:
A: This would give an incorrect result. Choice A is incorrect and may result from a calculation error.
B: This would give an incorrect result. Choice B is incorrect and may result from a calculation error.
C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.

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