R + c=24
r=3c
3c+c=24
x=6
So there are 18 rock CDs
        
             
        
        
        
Remember you can do anything to an eqautoin as long as you do oit to both sides
-5x=15
try to get 1x by itself
remember
(ax)/a=x when a=a
so
-5x=15
get x
divide both sides by -5
remember to flip sign
(-5x)/(-5)=15/(-5)
x=-3
answer is first one
x=-3 
        
                    
             
        
        
        
she surveyed "x" amount, which is the 100%, but we also know that 180 is the 37.5%, so

 
        
             
        
        
        
Answer:
-3
Step-by-step explanation: