All you have to do is subtract 3/8 from 7 which would give you 9 and 1/3
Why not? Because every math system you've ever worked with has obeyed these properties! You have never dealt with a system where a×b did not in fact equal b×a, for instance, or where (a×b)×c did not equal a×(b×c). Which is why the properties probably seem somewhat pointless to you. Don't worry about their "relevance" for now; just make sure you can keep the properties straight so you can pass the next test. The lesson below explains how I kept track of the properties.
Answer:
Step-by-step explanation:
9 - 6x = 45
-9 -9
_____________
-6x = 54
x = -9
________________________
So when you plug that answer into x-4 you get -9 -4, which equals -13.
