Question

How do you solve `\frac { 3u + 1} { 2}` at `u=-7`?

Answer 1

To solve this substitute `color(red)(-7)` for `color(red)(u)` in the expression and then do the calculations. See full explanation below.

Explanation:

`((3 xx color(red)(-7)) + 1)/2 -> (-21 + 1)/2 = 20/2 = 10`