Explanation
Let's first graph the elements:
Using the distance formula we get:

Let's solve your equation step-by-step.
5=(−4)(8)+b
Step 1: Simplify both sides of the equation.
5=(−4)(8)+b
5=−32+b
5=b−32
Step 2: Flip the equation.
b−32=5
Step 3: Add 32 to both sides.
b−32+32=5+32
b=37
Weeeeelllll, when dividing lets say long division 4 58..... Nevermind this topic is like so easy and your in highschool