Answer:
2(n-6)=12
(I went too far in my explanation; I'm not going to erase it because I think it is important to have an example on solving these)
Step-by-step explanation:
Twice the difference of a number and 6 is the same as 12.
Twice means 2 times
Difference means the result of subtracting something.
is the same as means equal to (=).
So we are given 2(n-6)=12.
You can start by dividing 2 on both sides are distributing 2 to terms in the ( ).
I will do it both ways and you can pick your favorite.
2(n-6)=12
Divide both sides by 2.
  n-6  =6
Add 6 on both sides
  n     =12
OR!
2(n-6)=12
Distribute 2 to both terms in the ( )
2n-12=12
Add 12 on both sides 
2n    =24
Divide both sides by 2
 n       =12
 
        
             
        
        
        
Answer:
A is the correct answer. 
Step-by-step explanation:
y and x meet on those numbers. And i did the test. 
hope this helps
 
        
                    
             
        
        
        
Answer:
87 / 100 I do believe will be your answer.
Step-by-step explanation:
1 is the greatest common divisor of 87 and 100, and therefore the result can't be further reduced. I hope this helps!
 
        
             
        
        
        
Answer
36/9= 4
Step-by-step explanation:
This is a fraction equal to
36 gallons ÷ 9 minutes
We want a unit rate where
1 is in the denominator,
so we divide top and bottom by 9
36 gallons	÷ 9
9 minutes	÷ 9
=	
4 gallons
1 minute
=	
4 gallons
minute
= 4 gallons per minute