you use elimination to solve. So multiply 2x+4y=-12 by 1 and x+2y=-2 by 2. then you subtract 2x+4y=-12 by 2x+4y=-4 and get 0y=-8. Anything divided by 0 is undefined/no solution because you can't divide anything by 0.
Hi! Shawna is correct because since it's multiplied to the 5-n you have to do the opposite which is division. Dexter is also correct because after distributing you can continue solving, there is nothing wrong with that. Hope this helps!