Mathnasium Job Assessment Practice Exam 2026 - Free Mathnasium Practice Questions and Study Guide

To find the value of y when x is equal to 2 in the equation y = 3x + 6, you simply substitute 2 for x in the equation.

Start with the equation:

y = 3x + 6

Now, replace x with 2:

y = 3(2) + 6

Next, perform the multiplication:

3(2) gives you 6. Now, substitute back into the equation:

y = 6 + 6

Now, add the two values together:

y = 12

Therefore, when x = 2, the value of y is 12, making it the correct answer.