I don't know if u can see it, but there.
X=12
Y=15
Z=20
Answer: just multiply 9 and y together: 9 x y
D would be the correct answer
Answer:
median = 5
Step-by-step explanation:
1,2,4,6,7,9
median = middle position = (4+6)/2 = 5
You can see that the term 
appears in both equations. In this cases, we can leverage this peculiarity and subtract the two equations to get rid of the repeated term. So, if we subtract the first equation from the second, we have
Now that we know the value of 
, we can substitute in any of the equation to deduce the value of 
: if we use the first equation, for example, we have
