Question

Sistema de ecuaciones 2x2
Ayuda!!

Answer 1

Explicación paso a paso:

$x + 3y = 9 \\ x - 2y = 14 \: \: \: \times ( - 1) \\ - x + 2y = - 14 \\ x + 3y = 9 \\ 5y = - 5 \\ y = \frac{ - 5}{5} = - 1 \\ y = - 1 \\ x + 3y = 9 \\ x + 3 \times ( - 1) = 9 \\ x + ( - 3) = 9 \\ x - 3 = 9 \\ x = 9 + 3 \\ x = 12$

$x + 3y = 12 + 3 \times ( - 1) = 12 - 3 = 9$

$x - 2y = 14 \\ 12 - 2( - 1) = 12 - ( - 2) = 12 + 2 = 14$

espero te sirva