Answer:
x-y=-5
Step-by-step explanation:
Standard form is Ax+By=C
A, B, and C are all going to be integers, not variables. Your variables in this equation are x and y, so you want to get your equation in the form of X and y on one side of the equals sign, and C, which will be -5, on the other side of the equals sign.
To get y on the other side of the equals sign, you need to subtract both sides of the equation by y (subtract because you use the opposite operation to get it on the other side, and because y is positive, you will subtract). The -5 will keep its minus sign because it is in front of the 5, and belongs to the 5.
See attached image on how to transfer