The answer would be y=-1.25x+1000 or y=-5/4x+1000. They are both the same just one is a fraction and one is a decimal. First you’d move the variable to the right so it would be 56y=56000-70x. Then you would divide both sizes by 56 and you would get y=1000-5/4x. After that you would just reorder them and get y=-5/4x+1000