Answer:
- 216/25 
8 16/25
8.64
Step-by-step explanation:
 
        
             
        
        
        
X+y=3
Subtract x from both sides
y=-x+3
Substitute 
2x--x+3=6
2x+x+3=6
3x+3=6
Subtract 3 from both sides
3x=3
Divide both sides by 3
x=1
        
             
        
        
        
50 because half of the numbers in 100 are even and all even numbers are divisible by two
        
             
        
        
        
It would be 18.37 because 4 is smaller then 5, so you round down.