It could be easier or faster to solve a problem by guessing what the answer is. Especially for multiple choice questions, simply plug in the given options and check which of them satisfy the conditions.

What is the solution to \( 2x + 3 = 999 \)?

A) 49

B) 498

C) 499

D) 501

E) 999

Solution: Trying the first option, \( 2 \times 49 + 3 = 101 \neq 999 \).

Trying the second option, \( 2 \times 498 + 3 = 999 \). The answer is B.

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