You can multiply either the top or bottom equation by -1 so lets say you apply it to the bottom equation it’ll look like this:
-9x + 9y = 18
6x - 9y = 12
then the +9y and -9y will cancel out
-9x = 18
6x =12
then you add the two equations together
-3x = 30
divide both sides by -3
x = -10
<span>Hi, A cylinder has 3 faces - 2 circle ones and a rectangle</span>
The order of operations is used to order numerical expressions
The third one
U solve from left to right and when two negatives are next to each other it turns to a plus.
Answer:
8x-9y=31
Step-by-step explanation:
