x - wiek ali
y - wiek oli
x+5=y
2(x-1)=y-1
2x-2=x+5-1
2x-x=4+2
x=6
y=11
odp. ala ma 6 lat
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x - wiek ali
y - wiek oli
x+5=y
2(x-1)=y-1
x+5=y
2x-2=x+5-1
x+5=y
2x-x=4+2
x+5=y
x=6
y=11
x=6
odp. ala ma 6 lat