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waga Natalii - x
waga Kamili - x+14
łączna waga - 92 kg
x+x+14 = 92
x+x = 92-14
2x = 78 /:2
x = 39 (kg)
39+14 = 53 (kg)
Odp: Natalia waży 39 kilogramów, a Kamila 53 kilogramy
y - kamila
x = (92 - 14)/2 = 39 kg
y = 39 + 14 = 53 kg
2x= 78
x=39-waga natalii
x+14= 39 + 14= 53- waga kamili
spr.
39+ 53= 92kg