в северной части Казахстан19304озера жол соответствует 2,5части всех озер страны найди общее количество озер на территории Казахстана​

Пусть утенок будет х,а гусенок у.Тогда 4х+5у=4100                                                             5х+4у=4000Вычтем второе значение из первого                                                            -х+у=100  у=100+х подставляем это значение                    4х+5(100+х)=4100                                                            9х=3600                                                            х=400                                                            у=100+400=500Гусенок весит 500г(утенок 400)      

I farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravyI farted with gravy