Answer:
Step-by-step explanation:
3x+6=12
 -6. -6
3x=6
Divid three by both sides.
X=2 
Each penicillin cost 2 dollars 
 
        
             
        
        
        
Answer:
Check the attachment as solved.
brainliest please ;)
 
        
             
        
        
        
Answer:
if the two lines have the same slope that means they are parallel
 
        
             
        
        
        
Step-by-step explanation:
Let the number be x, then
