Question

Розв'язати систему рівнянь:

Answer 1

Відповідь:

1)х=2 у=-1

2)х=2 у=

Пояснення:

Answer 2

$\displaystyle\bf\\1)\\\\\left \{ {{2x+y=3} \atop {3x-2y=8}} \right. \\\\\\\left \{ {{y=3-2x} \atop {3x-2\cdot(3-2x)=8}} \right. \\\\\\\left \{ {{y=3-2x} \atop {3x-6+4x=8}} \right.\\\\\\\left \{ {{y=3-2x} \atop {7x=8+6}} \right.\\\\\\\left \{ {{y=3-2x} \atop {7x=14}} \right.\\\\\\\left \{ {{y=3-2\cdot 2} \atop {x=2}} \right.\\\\\\\left \{ {{x=2} \atop {y=-1}} \right. \\\\\\Otvet \ : \ (2 \ ; \ -1)$

$\displaystyle\bf\\2)\\\\+\left \{ {{3x+y=12} \atop {-3x+5y=24}} \right. \\----------\\6y=36\\\\y=36:6=6\\\\3x=12-y=12-6=6\\\\x=6:3=2\\\\Otvet \ : \ (2 \ ; \ 6)$