Купили 1,2 кг конфет и 0,8 кг пиченья за всю покупку заплатили 5,96тыс рублей известно что 1 кг конфет дороже 1 кг печенья на 1,3 тыс рублей сколько стоит 1 кг конфет?
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20.05.2019 11:30
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3
1.2 X + 0.8 Y = 5960
X = Y + 1300
1.2 (Y + 1300) + 0.8 Y = 5960
1.2Y + 1560 + 0.8Y = 5960
2 Y = 4400
Y = 2200 - конфеты
Х = 2200 + 1300 = 3500