Question

система 4:x+3:y=1,
x+5y=3
решите пожалуйста ☺️❤️​

Answer 1

4÷х+3÷y=1

4x+3y=1

7xy=1

xy=7

x÷5y=3

5xy=3

xy=3×5

xy=15

Надеюсь что помогла

Answer 2

$\left \{ {{\frac{4}{x}+\frac{3}{y} =1 } \atop {x+5y=3}} \right.$

x =/= 0, y =/= 0

$\left \{ 4y+3x =xy } \atop {x=3-5y}} \right.\\\\\left \{ {{4y+3(3-5y)=y(3-5y)} \atop {x=3-5y}} \right. \\\\\left \{ {{4y+9-15y=3y-5y^2} \atop {x=3-5y}} \right. \\\\\left \{ {{5y^2+4y-15y-3y+9=0} \atop {x=3-5y}} \right. \\\\\left \{ {{5y^2-14y+9=0} \atop {x=3-5y}} \right. \\\\\left \{ {{y1=1; y2=1,8} \atop {x=3-5y}} \right.\\\\\left \{ {{y1=1; y2=1,8} \atop {x1=3-5*1; x2=3-5*1,8}} \right.\\\\\left \{ {{y1=1; y2=1,8} \atop {x1=-2; x2=-6}} \right.$

Ответ: (-2; 1), (-6; 1,8)