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Natalia - x
razem - 92
x+x+14=92
2x=92-14
2x=78
x=78:2
x=39kg <- waga Natalii
39+14=53kg <- waga Kamili
Jak coś to pisz na pw. :)
y- waga Kamili
x+y=92
x+14=y
x+x+14=92
y=x+14
2x=75
y=x+14
x=39
y=39+14
x=39
y=53
Odp.: Natalia waży 39kg, a Kamila 53