Lets say that you have 4-2=? you can use a bar model.... 
 {the stars are the bars}
 you have 4 total and now you need to subtract 2 
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{ i just took away 2 and then you count the bars but in this model count the stars}
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Hope this helps!!! 
        
                    
             
        
        
        
Answer:
3 units  
Step-by-step explanation:
 
        
             
        
        
        
It's <span>Diophantine equation. 
First, we need to found gcd(6,(-2)):</span>
6=2*3
(-2)=(-1)*2
So, gcd(6,-2)=2
Now, the question is. Can we dived c=24, by gcd(6,-2) and in the end get integer?
Yes we can.

So, we can solve it.
Now is the formula:

Second, we need the first pair (x0,y0) 
 if
x=0
then

Third, we gonna use that formula:

Congratulations! We solve it.
 
        
        
        
Answer:
The origin is where the x-axis and the x-axis equal zero. Carter is 15 points up from the origin on the y-axis and 3 points to the right from the origin on the x-axis.
 
        
                    
             
        
        
        
Step-by-step explanation:
Here
5x+16+7x-3+6x+5 = 180(being sum of triangle)
or, 18x=180-18
or, x= 162/18
so, x = 9
now,
here,
<ACD = <ACB(diagonals of parallelogram bisect eachother)
or, <ACD = 7x-3
or, <ACD = 7×9-3
or, <ACD = 63-3
So, <ACD = 60°