10 is the most amount if pages allowed because 10 times $5 is $50.
Add the two equations together with the same variables
-x+4x=3x
-3y+3y=0
20+1=21
You now get
3x=21
Divide and find x =7
Plug in x to the equation to find y
Y=-9
(7,-9)
3. Because it goes into all the numbers of the equation
I think it’s p=36 because you have to do the opposite on both sides..
So..
q=-12
P/-12=-3
+12 *12
P=36