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y- waga margaryny
x+y= 250
77%x+82%y=80%*250
x+y=250
0,77x+0,82y=0,8*250 | *100
x+y=250 | * (-77)
77x+82y=8*25000
-77x-77y=19250 |
77x+82y=20000 | +
_______________________
5y=750 | /5
y=150
x=250-150=100
y=150