x=wiek basi obecniey= wiek agnieszki obecniex-1=2(y-1)x=y+5y+5-1=2y-2x=y+5y-2y=-2-5+1x=y+5-y=-6x=y+5y=6x=6+5y=6x=11odp.
basia ma 11 a agnieszka 6 lat
2(x-1)=y-1 2x-2=y-1 2x-y=1 x=6 x=6
y-5=x y-x=5 y-x=5 y-5=6 y=11
x - wiek Agnieszki
y- wiek Basi
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x=wiek basi obecnie
y= wiek agnieszki obecnie
x-1=2(y-1)
x=y+5
y+5-1=2y-2
x=y+5
y-2y=-2-5+1
x=y+5
-y=-6
x=y+5
y=6
x=6+5
y=6
x=11
odp.
basia ma 11 a agnieszka 6 lat
2(x-1)=y-1 2x-2=y-1 2x-y=1 x=6 x=6
y-5=x y-x=5 y-x=5 y-5=6 y=11
x - wiek Agnieszki
y- wiek Basi