Yes teachers say to do that all the time it helps you
        
             
        
        
        
Answer:
No solutions
Explanation:
The given system of equations is
2y = x + 9
3x - 6y = -15
To solve the system, we first need to solve the first equation for x, so
 2y = x + 9
2y - 9 = x + 9 - 9
2y - 9 = x
Then, replace x = 2y - 9 on the second equation
 3x - 6y = -15
 3(2y - 9) - 6y = -15
3(2y) + 3(-9) - 6y = -15
 6y - 27 - 6y = -15
 -27 = -15
Since -27 is not equal to -15, we get that this system of equation doesn't have solutions.
 
        
             
        
        
        
Answer:
I thing mga 15oz po yung sagit
 
        
             
        
        
        
4cm, as if two of the sides add up to be the same length as the first side then the triangle would be a straight line.