Question

X
2x - 5y =-9
x+4y= 2​

Answer 1

Explicación paso a paso:

$x + 4y = 2 \: \: \: ( \times - 2) \\ - 2x - 8y = - 4 \\ 2x - 5y = - 9 \\ - 13y = - 13 \: \: \: ( \times - 1) \\ 13y = 13 \\ y = \frac{13}{13} = 1$

$x + 4y = 2 \\ x + 4 \times 1 = 2 \\ x + 4 = 2 \\ x = 2 - 4 = - 2 \\ x = - 2$