7.2
Bolek i Lolek mają razem 14 lat. Bolek jest o dwa lata starszy od Lolka. Ile lat ma każdy z nich?
Bolek i Lolek - 14 lat razem
Lolek - x
Bolek - x+2
x+x+2=14
2x+2=14
2x=12 /:2
x=6
Odp. Lolek ma 6 lat a Bolek ma 8 lat.
x= wiek Bolka
x-2 = wiek Lolka
x+x-2 = 14
2x=16
x=8 = wiek Bolka
x-2 =8-2 = 6 =wiek Lolka
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Bolek i Lolek - 14 lat razem
Lolek - x
Bolek - x+2
x+x+2=14
2x+2=14
2x=12 /:2
x=6
Odp. Lolek ma 6 lat a Bolek ma 8 lat.
x= wiek Bolka
x-2 = wiek Lolka
x+x-2 = 14
2x=16
x=8 = wiek Bolka
x-2 =8-2 = 6 =wiek Lolka