-15y<3

To solve -15y < 3 divide both sides by -15

 --- WARNING! if you multiply or divide both sides of an inequality, you MUST change the direction of the inequality ---

---?  -15y / -15  >  3/-15                 notice the change of direction of the inequality

                     y    > -1/5

if you are trying to graph  $$\mathrm{-15}\textit{y}\mathrm{<3}$$ , then use a graphing calculator!