\[ \begin{gathered} -15x+10<0\\ \qquad\qquad\quad -15x<-10\qquad (\phantom{{}}\times-1)\\ 15x>10\\ x>\frac{10:5}{15:5}\\ x>\frac{2}{3} \end{gathered} \]

\[ \bbox[#FFCCCC,10px] {V=\left.\phantom{{\frac{}{}}}\right]\;\frac{2}{3};\infty\;\left[\phantom{{\frac{}{}}}\right.} \]