Solve- 3y - 7 =8 i cannot figure this ! i have no idea how to do this either. ? !

Y=-5 because you add 7 to both sides to get -3y=15 and if you divide that you get y=-5

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.