Ontario Mathematics Proficiency Practice Test

Question: 1 / 400

If x = 7, what is the value of 2x + 3?

10

14

17

To find the value of the expression \( 2x + 3 \) when \( x = 7 \), you start by substituting \( 7 \) for \( x \) in the expression.

So, you calculate:

\[

2(7) + 3

\]

First, multiply \( 2 \) by \( 7 \):

\[

2 \times 7 = 14

\]

Next, add \( 3 \) to \( 14 \):

\[

14 + 3 = 17

\]

Thus, the correct value of \( 2x + 3 \) when \( x = 7 \) is \( 17 \). This corresponds directly to the evaluated expression, confirming that the steps taken were accurate in arriving at the result.

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