If x = 3, what is the value of 2x + 1?

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To determine the value of the expression 2x + 1 when x equals 3, we start by substituting 3 for x in the expression. This gives us:

2(3) + 1.

Now, we perform the multiplication:

2 * 3 = 6.

Next, we add 1 to this result:

6 + 1 = 7.

Therefore, when x equals 3, the value of the expression 2x + 1 is 7. This is why the correct answer is indeed 7.