Question

Решите систему
4х-у=-19
3у-4х=33

Answer 1

$4x - y = - 19 \\ 3y - 4x = 33 \\ \\ 4x - y = - 19 \\ - 4x + 3y = 33 \\ \\ - y + 3y = - 19 + 33 \\ 2y = 14 \\ y = 7 \\ \\ 4x - 7 = - 19 \\ 4x = - 12 \\ x = - 3$

(х ; у) = (-3 ; 7)

Answer 2

Ответ:

x = -3; y = 7.

Объяснение:

$4x = - 19 + y \\ 3y - 4x = 33$

$3y - ( - 19 + y) = 33$

$y = 7$

$3 \times 7 - 4x = 33$

$x = - 3$