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1)
x - liczba kur
y - liczba króliczków
x+y=16
2x+4y=44
x=16-y
2x+4y=44
x=16-y
2(16-y)+4y=44
x=16-x
32-2y+4y=44
x=16-y
2y=44-32
2y=12
2y=12/ :2
y=6
x=16-6
x=10
y=6
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2)
x - liczba kur
y - liczba króliczków
x+y=20
2x+4y=70
x=20-y
2(20-y)+4y=70
x=20-y
40-2y+4y=70
x=20-y
2y=30/ :2
y=15
x=20-15
x=5
y=15