Question

3x +5y =7
2x - y =-4​

Answer 1

Respuesta:

$y1 = \frac{7 - 3x}{5} \\ y2 =2x + 4 \\ y1 = y2 \\ \frac{7 - 3x}{5} = 2x + 4 \\ 7 - 3x = 10x + 20 \\ - 13 = 13x \\ - 1 = x$

$2( - 1) - y = - 4 \\ - 2 + 4 = y \\ 2 = y$