Question

ПОМОГИИТЕЕЕЕ СРОЧНОО​

Answer 1

Ответ:

(-1; 3)

Пошаговое объяснение:

{5(x + 7) -3(y - 8) = 3*15

{3(x + 5) +4( y + 9) = 5 *12

{5x - 3y = 45- 35 -24

{3x +4y = 60 - 15 -36

{5x - 3y = -14  | * (-3)

{3x + 4y = 9    | *5

{-15x +9y = 42

{15x +20y = 45

       29y = 87

y = 3

15x = 9y - 42 = 9 * 3 - 42 = 27 - 42 = -15

x = - 1