Найти два числа сумма которых равна 22,а разность 10

Ответ №1

$\left \{ {{x+y=22} \atop {x-y=10}} \right. \\\\+---\\2x=32\ /:2\\\\x=16\\\\\left \{ {{x=16} \atop {y=22-16}} \right. \\\\\left \{ {{x=16} \atop {16+y=22}} \right. \\\\\left \{ {{x=16} \atop {16+y=22}} \right. \\\\\left \{ {{x=16} \atop {y=6}} \right. \\$