Answer:
1. Skylar may have noticed that once you distribute the number outside the parentheses to those within you get a 15x which combines with the 4x thats already on that side to make 19x. Since we have 19x on both sides, whatever else we do is moot because you can't take 19x from 19x without completing getting rid of the variable.
2. Stan was correct, he didn't fail to recognize anything.
Explanation:
Explanation above