Question

1000p for an answer please

Answer 1

Well, it asks that you evaluate 24 for y.
Also, notice that it says "the difference of a number and 6"
So your equation should have been
y - 6

And after evaluating
24 - 6 

Then solve 
24 - 6 = 18
18 should have been the answer

So no, the student's work is not correct, because the student wrote a division expression instead of a subtraction equation