Posted by alex on Tuesday, September 11, 2007 at 6:56pm.
4 + x = 8 - 2
Let's get the numbers on one side of the equal sign and the unknown on the other side. To do that we need to subtract 4 from each side.
x + 4 - 4 = 8 - 2 - 4
x = 8 - 6
x = 2