Answer: 644 
Step-by-step explanation:
700 - 56 = 644
 
        
             
        
        
        
5x-3=21-x
6x=24
X=4
You simply have to isolate the variable and then divide by 6 so that x is completely alone.
        
                    
             
        
        
        
Answer:
$162.94
Step-by-step explanation:
Because 20% off of 192.15 = $162.94 and 
$153.72  + (6.0%) $9.22  = $162.94
 
        
             
        
        
        
Answer: 
87q-6
sorry if i am incorrect.
Step-by-step explanation:
 
        
             
        
        
        
that is not a function, because there are two outputs for three. two inputs can have one output, but one input cant have two outputs.