уравнение ; (х+12456)-7658=8001
уравнение; (m-379)+125=3000

(х+12456)-7658=8001х+12456=8001+7658х+12456=15659х=15659-12456х=3203(м-379)+125=3000м-379=3000-125м-379=2875м=2875+379м=3254

(Х+12456)-7658=8001                                   (m-379)+125=3000   Х+12456=8001+7658                                     m-379=3000-125 Х+12456=15659                                            m-379=2875 Х=15659-12456                                             m=2875+379Х=3203                                                         m=3254     Проверка                                                     Проверка(3203+12456)-7658=8001                              (3254-379)+125=3000