Question

розвяжіть систему рівняннь
срочно

Answer 1

Ответ:

решение смотри на фотографии

Answer 2

$\displaystyle\bf\\\left \{ {{\dfrac{2x-y}{3} +\dfrac{4y-1}{5} =2\dfrac{1}{5} } \atop {\dfrac{2y+3x}{4} -\dfrac{x-y}{3} =\dfrac{x}{12} }} \right. \\\\\\\left \{ {{\dfrac{2x-y}{3} \cdot 15+\dfrac{4y-1}{5} \cdot 15=\dfrac{11}{5} \cdot 15} \atop {\dfrac{2y+3x}{4}\cdot 12 -\dfrac{x-y}{3}\cdot 12 =\dfrac{x}{12} \cdot 12}} \right. \\\\\\\left \{ {{(2x-y)\cdot 5+(4y-1)\cdot 3=11\cdot 3} \atop {(2y+3x)\cdot 3-(x-y)\cdot 4= x}} \right. \\\\\\\left \{ {{10x-5y+12y-3=33} \atop {6y+9x-4x+4y=x}} \right.$

$\displaystyle\bf\\\left \{ {{10x+7y=36} \atop {4x+10y=0}} \right.\\\\\\\left \{ {{10\cdot(-2,5y)+7y=36} \atop {x=-2,5y}} \right. \\\\\\\left \{ {{-25y+7y=36} \atop {x=-2,5y}} \right. \\\\\\\left \{ {{-18y=36} \atop {x=-2,5y}} \right. \\\\\\\left \{ {{y=-2} \atop {x=-2,5\cdot(-2)}} \right. \\\\\\\left \{ {{y=-2} \atop {x=5}} \right. \\\\\\Otvet: \ \Big(5 \ ; \ -2\Big)$