math(need to know if i worked this right)
posted by Sandra .
simplify x3/3  x2/5
5(x3)  3(x2)/15
5x15  3x+6/15
is it :2x21/15???

Your lack of brackets make the order of operation incorrect.
Here is probably what you meant
(x3)/3  (x2)/5
=(5(x3)  3(x2))/15
= (5x15  3x+6)/15
= (2x  9)/15
notice your constant in the last line is incorrect