Answer:
12 and 15
Step-by-step explanation:
x + y = 27
x +3 = y
x = y - 3
y - 3 + y = 27
2y = 24
y = 12
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Hello, please consider the following.

Hope this helps.
Do not hesitate if you need further explanation.
Thank you
 
        
                    
             
        
        
        
1920÷12= 160
Step-by-step explanation:
1920÷12= 160
 
        
             
        
        
        
3n+2n+4=9n+12
5n+4=9n+12
4-12=9n-5n
-8=4n
Divide both sides by 4
n=-2
        
             
        
        
        
Answer:
Step-by-step explanation:
-5x - 8y = -3
 5x + 9y = 3
y = 0
5x + 0 = 3
5x = 3
x = 3/5
(3/5, 0)