Question

СРОЧНОООООООО
ИМЕННО СЛОЖЕНИЕМ))

Answer 1

а)
$2x + 3y = 13 \ 4x - y = 5 \ \ 2x + 3y = 13 \ 12x - 3y = 15 \ \ 14x = 28 \ y = 4x - 5 \ \ x = 2 \ y = 4x - 5 \ \ x = 2 \ y = 3$
Ответ: (2; 3)

б)
$3x - 2y = 7 \ - 4x + 3y = - 7 \ \ 9x - 6x = 21 \ - 8x + 6y = - 14 \ \ x = 7 \ y = frac{3x - 7}{2} \ \ x = 7 \ y = 7$
Ответ: (7; 7)

в)
$frac{x}{2} + frac{y}{3} = 2 \ 2x - 3y = - 5 \ \ 3x + 2y = 12 \ 2x - 3y = - 5 \ \ 9x + 6y = 36 \ 4x - 6y = - 10 \ \ 13x = 26 \ y = frac{2x + 5}{3} \ \ x = 2 \ y = frac{2x + 5}{3} \ \ x = 2 \ y = 3$
Ответ: (2; 3)