Question

c. 4x-8y = 8
-6x+4y = -28

ecuaciones lineales por igualación​

Answer 1

Respuesta:

$4x - 8y = 8 \\ 4 \times 6 - 8 \times 2 = \\ 24 - 16 = 8$

$- 6x + 4y = - 28 \\ - 6 \times 6 + 4 \times 2 = \\ - 36 + 8 = - 28$

espero te sirva

Explicación paso a paso:

$4x - 8y = 8 \\ 4x = 8 + 8y \\ x = \frac{8 + 8y}{4} \\ - 6x + 4y = - 28 \\ - 6x = - 28 - 4y \\ x = \frac{ - 28 - 4y}{ - 6} \\ \frac{8 + 8y}{4} = \frac{ - 28 - 4y}{ - 6 } \\ - 48 - 48y = - 112 - 16y \\ 112 - 48 = - 16y + 48y \\ 64 = 32y \\ y = \frac{64}{32} = 2$

$4x - 8y = 8 \\ 4x - 8 \times 2 = 8 \\ 4x - 16 = 8 \\ 4x = 8 + 16 \\ 4x = 24 \\ x = \frac{24}{4} = 6$