<span>3x + y =3 
Y = 2x - 7
substitute </span>Y = 2x - 7 into  3x + y =3 
3x + y =3 
3x +2x - 7 =3 
5x = 10
x = 2
Y = 2x - 7 = 2(2) - 7 = -3
answer
(2, -3)
        
                    
             
        
        
        
I feel like it’s d because it is changed to the other form
        
             
        
        
        
Answer:
2nd
Step-by-step explanation:
using the quadric formula 

do the math and you get the second one. 
{-1/3,5/2}
 
        
             
        
        
        
You have x , x+7, and 7x-7. When you add those up and equal it to 180 you can get your x. X equals 20 
So one angle is 20 degrees
The second angle is 27 degrees
And the third angle is 133 degrees.
        
             
        
        
        
Answer:
11.661904
plz mark me as brainliest.