Ответ : разность двух чисел равна 21 , а их частное равно 3,1 .

[tex]\displaystyle\bf\\\left \{ {{x-y=21} \atop {\dfrac{x}{y} =3,1}} \right. \\\\\\\left \{ {{x-y=21} \atop {x=3,1y}} \right. \\\\\\\left \{ {{3,1y-y=21} \atop {x=3,1y}} \right. \\\\\\\left \{ {{2,1y=21} \atop {x=3,1y}} \right. \\\\\\\left \{ {{y=10} \atop {x=3,1\cdot10}} \right. \\\\\\\left \{ {{y=10} \atop {x=31}} \right. \\\\\\Otvet \ : \ x=31 \ \ ; \ \ y=10[/tex]