[tex] \begin{cases} 3x - 5y = 2 \\ 4x + 5y = 19\end{cases}[/tex]
[tex]3x + 4x = 2 + 19 \\ 7x = 21 | \div 7 \\ x = 3[/tex]
[tex]4 \times 3 + 5y = 19 \\ 12 + 5y = 19 \\ 5y = 7 | \div 5 \\ y = \frac{7}{5} \\ y = 1 \frac{2}{5} \\ y = 1.4[/tex]
[tex] \begin{cases} x = 3 \\ y = 1.4\end{cases}[/tex]
