x- wiek Kamila y-wiek Łukasza x=3+y x+y=35 x=3+y 3+y+y=35 x=3+y 2y=35-3 x=3+y 2y=32/:2 x=3+y y=16 x=3+16 y=16 x=19 y=16
odp: Kamil ma 19 lat.
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x- wiek Kamila
y-wiek Łukasza
x=3+y
x+y=35
x=3+y
3+y+y=35
x=3+y
2y=35-3
x=3+y
2y=32/:2
x=3+y
y=16
x=3+16
y=16
x=19
y=16
odp: Kamil ma 19 lat.
y-Łukasz
y=x-3
x+y=35
y=x-3
x+x-3=35
y=x-3
2x=38
y=x-3
x=19
y=19-3
x=19
y=16
x=19
Kamil ma 19 lat, a Łukasz 16 lat