Question

X y 12 -1, (6x + y = -120. - 2) 8
помогите пожалуйста!!!
6 класс
дам 30 баллов!!!​

Answer 1

$\displaystyle\bf\\\left \{ {{ \frac{x}{8} + \frac{y}{12} = - 1 \: \: | \times 24 } \atop {6x + y = - 120 }} \right. \\ \displaystyle\bf\\\left \{ {{ 3x + 2y = - 24 } \atop {6x + y = - 120 \times ( - 2) }} \right. \\ \displaystyle\bf\\ + \left \{ {{3x + 2y = - 24} \atop { - 12x - 2y = 240 }} \right. \\ \\ 3x - 12x = 240 - 24 \\ - 9x = 216 \\ x = 216 \div ( - 9) \\ x = - 24 \\ \\ 6 \times ( - 24) + y = - 120 \\ - 144 + y = - 120 \\ y = 144 - 120 \\ y = 24$

Ответ: ( - 24 ; 24 )