y=2.5
x=3.5
Пошаговое объяснение:
x+7+y=13
x+y=6
x=6-y
(100x+70+y)-(100+70+x)=396
(100*(6-y)+70+y)-(100+70+(6-y)=396
600-100y+70+y-100+70+6-y=396
-100y=-250
100y=250
x=6-2.5=3.5
