Answer:
9.9
Step-by-step explanation:
 
        
             
        
        
        
K=4
add seven on both sides
2x-4y=7
add 4y on both sides
2x=7+4y
divide 2 on both sides
x=7+4y/2
plug that into original equation
2(7+4y/2)-4y-7=0
7 and 4y cancel out
2(2)=0
4=0
        
             
        
        
        
The answer is >>> 4 989 600
        
             
        
        
        
Answer:
2 1/3 
Step-by-step explanation:
1 3/4  is equivalent to 7/4
1 1/3 is equivalent to 4/3 
7/ 4 x 4/3 
reduce with greatest common factor so the two 4 are out (show a line crossing out the top and bottom 4 ) 
 now you're left with 7 x 1/3 = 7/3
7/3 = 2 1/3