Question

sistema de ecuaciones
2x+ 5y=13
4x - 3y= -13​

Answer 1

Respuesta:

$2 \times - 1 + 5 \times 3 = 13 \\ 4 \times - 1 - 3 \times 3 = - 13$

Explicación paso a paso:

$2x + 5y = 13 \: \: \: \times ( - 2) \\ - 4x - 10y = - 26 \\ 4x - 3y = - 13 \\ - 13y = - 39 \\ 13y = 39 \\ y = \frac{39}{13} = 3$

$2x + 5y = 13 \\ 2x + (5 \times 3) = 13 \\ 2x + 15 = 13 \\ 2x = 13 - 15 \\ 2x = - 2 \\ x = \frac{ - 2}{2} = - 1$