A : inches 
B:centimeters 
C:feet
D:inches
        
             
        
        
        
Answer:
i really do not know the answer
 
        
                    
             
        
        
        
A coefficient is the number before the variable so the coefficient of x would be number before the x. the number before x is A.-9
        
             
        
        
        
Answer:
x=28
Step-by-step explanation:
x+24+100+x=180
x+124+x=180
2x+124=180
2x=180-124
2x=56
divide both side by number attached to the x
therefore x=28