Subtract the 2 equations
     7x+2y=-19
-    -x+2y = 21
--------------------------
     8x +0y=-2
x= -1/4
        
             
        
        
        
The equation factors as
.. (x +3)(x +4) = 0
By the zero-product rule, the roots are
.. x1 = -4
.. x2 = -3
 
 
        
        
        
Answer:
The coefficient is "12" 
Step-by-step explanation:
Step 1: Encircle the variable along with its power whose coefficient we are finding.
Step 2: Leave that variable and consider all other numbers or variables written with it. That will be the coefficient.
 
        
                    
             
        
        
        
Answer:
ok
Step-by-step explanation:
ok