Which expression is equivalent to the expression shown below?

How to do this , and can some one explain

If benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

X+y=-4 x-y=2 use elimination with adding and subtraction