Answer:
-3y/5
Step-by-step explanation:
3/5y+(-6/5y)=
Since the denominator is the same, we can add the numerators
3y - 6y
----------------
5
The problem equals -3/5y
3/5y is 0.6y
-6/5 is -1.2y
0.6y-1.2y equals -0.6y or -3/5y
