Question

Сумма двух чисел равна 749, а из разность равна 109. Найдите эти числа

Answer 1

$\left \{ {{x+y=749} \atop {x-y=109}} \right. \\ \left \{ {{2x=858} \atop {x-y=109}} \right. \\ \left \{ {{x=429} \atop {x-y=109}} \right. \\ \left \{ {{x=429} \atop {429-y=109}} \right. \\ \left \{ {{x=429} \atop {y=429-109}} \right. \\ \left \{ {{x=429} \atop {y=320}} \right.$