Answer:
x = 16
Step-by-step explanation:
  SR = ST ⇒ Two sides are equal. So, ΔSRT is an isosceles triangle.
The angles opposite to equal sides are equal. 
   ⇒  ∠STR  = ∠R
        ∠STR = 4x - 28
Linear pair: If a ray stands on a line, then the adjacent angles are supplementary and they are called linear pair
∠STR + ∠STU = 180°    {linear pair}
 4x - 28 + 9x = 180
4x + 9x - 28  = 180      {Combine like terms}
        13x- 28 = 180 
Add 28 to both the sides
           13x    = 180 + 28
            13x  = 208
Divide both sides by 13
               x = 208/13
   
 
        
                    
             
        
        
        
Answer:
2(4x-6)
4(2x-3)
8(x-3/2)
Step-by-step explanation:
find all factors of 8 other than 1, you should have 3
divide the whole equation by the factor then multiply by the factor
2(8x-12)/2 = 2(4x-6)
4(2x-3)
8(x-3/2)
 
        
             
        
        
        

so our slope is undefined, that means a vertical line, check the picture below