Do banku wpłacono 4500 zł w banknotach po : 100 zł i po 50 zł. Oblicz ile przelano 50, a ile 100 jesli wystkich było 61. uklad rownan musi byc
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x- ilosc banknotow 50 zl
y = 61-x ilosc banknotow 100zl
x+y=61
50x+100y=4500
y=61-x
100(61-x)+50x=4500
6100-100x+50x=4500
-50x=-1600 /:(-50)
x= 32
y=61-32=29
Odp. Banknotow 100 zl bylo 29, a 50 zl 32