$y=3 x+2$

Step 1 ：Given the equation: \(y = 3x + 2\)

Step 2 ：Let's find the value of y when \(x = 5\)

Step 3 ：Plug in the value of x: \(y = 3(5) + 2\)

Step 4 ：Simplify the equation: \(y = 15 + 2\)

Step 5 ：Calculate the value of y: \(\boxed{y = 17}\)