Code is a word or a symbol which is not disclosed to everyone and is considered as secretive. There are various codes which are required to run a software in order to minimize the risk of piracy. These codes are binary codes or java codes. These are complex so that not everyone can crack it.
You have x , x+7, and 7x-7. When you add those up and equal it to 180 you can get your x. X equals 20 So one angle is 20 degrees The second angle is 27 degrees And the third angle is 133 degrees.