Answer:
B. 21
Step-by-step explanation:
 
        
             
        
        
        
Answer:
a=29/42
Step-by-step explanation:
6a-1÷7=4
first write the division as a fraction
6a-1/7=4
add 1/7 to each side 
6a=4+1/7
which is equal to 
6a=29/7
divide both sides by 6 
a=29/42
 
        
             
        
        
        
Answer:
b. x less-than StartFraction 10 Over 3 End fraction
 
        
             
        
        
        
Answer:
the answer is c 
Step-by-step explanation:
took the test