\(\frac{2}{15}\cdot\frac{3}{x}=-\frac{70}{21}\)
\(\frac{3}{x}=-\frac{70}{21}:\frac{2}{15}\)
\(\frac{3}{x}=-25\)
\(x=3:\left(-25\right)=-\frac{3}{25}\)
\(\frac{3}{x}=\frac{-70}{21}\div\frac{2}{15}\)
\(\frac{3}{x}=-25\)
\(\Rightarrow x=\frac{-3}{25}\)