Be careful about the answer above because there seems to be a mistake.
Yes, to rewrite the equaiton in standard form
Ax + By = C but you are not allowed to lead with a negative number for A.
So, if you move the x term to the left then it will be -x + y = -5
However, to complete the standard equation you need to mulitply or divide the entire equation by -1
-1(-x + y = -5) = x -y = 5
Answer= x- y =5