Set 3: Trigonometry

Explanation

Answer: B

If $9x + 3 = 21$ , what is the value of $x$ ?

✓ Correct

Detailed Explanation

Choice B is correct. 1. Start: $9x + 3 = 21$ Subtract 3: $9x = 18$ Divide by 9: $x = 2$ Therefore, $x = 2$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 2

Why others are wrong:

A: This would give an incorrect result. Choice A 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.

D: This would give an incorrect result. Choice D is incorrect and may result from a calculation error.

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