Question

X+4y = 27 X+2y = 15
Ayuda xfa​

Answer 1

Explicación paso a paso:

$x + 4y = 27 \\ x + 2y = 15 \: \: \: \: \times ( - 1) \\ - x - 2y = - 15 \\ x + 4y = 27 \\ 2y = 12 \\ y = \frac{12}{2} = 6 \\ y = 6$

$x + 4y = 27 \\ x = 27 - 4y \\ x = 27 - 4 \times 6 = 27 - 24 = 3 \\ x = 3$

$x + 4y = 3 + 4 \times 6 = 3 + 24 = 27$

$x + 2y = 3 + 2 \times 6 = 3 + 12 = 15$

espero te sirva