Solve the System $$\left\{ \begin{array} { c } 0.3 x - 0.1 y = 1.5 \\- 0.2 x + 0.4 y = - 3.0\end{array} \right.$$

Solve the system. $$\left\{ \begin{array} { c } 0.3 x - 0.1 y = 1.5 \\- 0.2 x + 0.4 y = - 3.0\end{array} \right.$$