Basia jest o 5 lat starsza od Agnieszki . Rok temu była 2 razy starsza od Agnieszki. Ile lat ma Agnieszka?
x-wiek kasi
y-wiek agnieszki
y+5 = xx-1 = 2y
x= y+5x-1=2yx= y+5y+5 -1 = 2yx= y+5y-2y= -1-5x= y+5-y=-6 | * (-1)
x= y+5y=6
op.agnieszka a 6 lat
Aga-xlat
Basia -x+5
rok temu a-(x-1)
b - 2*a 2(x-1)=(x+5-1)
2x-2 =x*4
x=6
a ga ma 6 , b asia ma 11
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y- wiek Agnieszki
y+5 = x
x-1 = 2y
x= y+5
x-1=2y
x= y+5
y+5 -1 = 2y
x= y+5
y-2y= -1-5
x= y+5
-y=-6 | * (-1)
x= y+5
y=6
x= 6+5
y=6
x=11
y=6
x-wiek kasi
y-wiek agnieszki
y+5 = x
x-1 = 2y
x= y+5
x-1=2y
x= y+5
y+5 -1 = 2y
x= y+5
y-2y= -1-5
x= y+5
-y=-6 | * (-1)
x= y+5
y=6
op.agnieszka a 6 lat
Aga-xlat
Basia -x+5
rok temu a-(x-1)
b - 2*a 2(x-1)=(x+5-1)
2x-2 =x*4
x=6
a ga ma 6 , b asia ma 11