Answer:
The value of x and y is 9, 5.
Step-by-step explanation:

first we subtract the equation (i) to (ii)...

Put the value of x in equation (i) ...
equation (i)

Y=3
..............................
Answer:
-23
Step-by-step explanation:
To answer the question, let B call the amount of meat and P the number of potatoes.
The recipe says that for every pound of meat we need 3 potatoes.
Then that relationship is written as follows:


If we increase the amounts of the recipe by 100%, it will multiply by 2 the amount of meat and also that of potatoes. Therefore we need 2 pounds of meat and 6 potatoes.
Then the relationship is:

But 
Therefore, the proportion that represents the situation remains the same 
This occurs because the increase in the amount of potatoes and beef was in the same proportion.