All you need to do is divide 96 by 8 and you get 12 as your answer
        
                    
             
        
        
        
The diagonals of a parallelogram bisect each other so
4x - 7 = x + 2 and
5y - 8 = 3y
4x - 7 = x + 2 so 3x = 9 and x = 3
5y - 8 = 3y so 2y = 8 and y = 4
        
             
        
        
        
<span>twice the sum of a number and seven is 8
 2(x+7)=8</span>
        
             
        
        
        
The slope is 1/3 because slope is rise over run so you go up one unit and go right three units.