Question

розв'яжіть систему рівнянь способом підстановки 4x-2y=6 , x+y=3

Answer 1

Ответ:

(2;1)

Объяснение:

Answer 2

$\displaystyle\bf\\\left \{ {{4x-2y=6} \atop {x+y=3}} \right. \\\\\\\left \{ {{4x-2\cdot(3-x)=6} \atop {y=3-x}} \right. \\\\\\\left \{ {{4x-6+2x=6} \atop {y=3-x}} \right.\\\\\\\left \{ {{6x=12} \atop {y=3-x}} \right. \\\\\\\left \{ {{x=2} \atop {y=3-2}} \right. \\\\\\\left \{ {{x=2} \atop {y=1}} \right. \\\\\\Otvet \ :(2 \ ; \ 1)$