What is 8x+4y=12 7x+3y=1 o

Ok so you add the 4y and the 3y together and get 7y then you add the 8x and the 7x together and you get 15x then add the 1o and the 12 and you get 13o and since you are left with 15x+7y=13 o that's your answer because you can't add or subtract the x and the y because they are different variables