Question

3x -y = 3. 2x +5y =19

Answer 1

$3x - y = 3 \\ 3x = 3 + y \: \: ^{ \div 3} \\ x = 1 + \frac{y}{3} \\ \\ 2x + 5y = 19 \\ 2x = 19 - 5y \\ x = \frac{19}{2} - \frac{5}{2} y$