I had a hard time with 3-4 because I didn’t understand how to do it but then I found out that if I did it the way I am going to show you it made it a whole lot easer. Here is a easy example but I will make a harder one V + 7 = 18        V=11 I got that by – the 7 by 18 and you get the answer 11.

example 2

V – 40.57 = 38.34           V=2.23  I got that by – 40.57 by 38.34 which = 2.23