U/9 = 8/12 u = 6
Step 1: Cancel the common factor (4)
u = 2
—- —-
 9 3
Step 2: multiply both sides by 9
9u 2 * 9
—- = ——-
 9 3
Step 3: simplify 
2 *9 = 18
18 ÷ 3 = 6
u = 6
        
             
        
        
        
Answer:
Consider the expression  . q is called the quotient, a is is the dividend and b is the divisor.
. q is called the quotient, a is is the dividend and b is the divisor.
Since q is a multiple of 6, then q has the form  for some integer k.
 for some integer k.
Since a is a multiple of 9, then a has the form  for some integer s.
 for some integer s.
Since b is a factor of 12, then if 12 can be expressed of the form  , for c an integer. Then b has the form
, for c an integer. Then b has the form 
Replacing the preview expression in the initial expression we obtain:

Then  is a equation to Isabel's problem.
 is a equation to Isabel's problem.
 
        
             
        
        
        
Answer:
3200 = 168x + 8
Step-by-step explanation:
$3200 is the total sales in dollars, so we're going to plug that in for y (it says in the equation that y represents the total sales in dollars). And the rest of the equation stays the same. 
I hope this helped!
 
        
                    
             
        
        
        
////////////////////The answer is -16