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y=obecny wiek eli
x=y-4
x+6+y+6=34
y-4+6+y+6=34
2y=34+4-6-6
2y=26
y=26:2
y=13 lat ma ela
x=y-4=13-4=9 lat ma hania
x+4 Wiek Eli
Razem mają 34 lata za 6 lat.
(x+6)+(x+4+6)=34
2x+16=34
2x=34-16
2x=18
x=9
Hania ma 9 lat a Ela 13
Ela - x
x-4+6+x+6 = 34
2x = 34+4-6-6
2x = 26 |:2
x = 13
Hania = 13-4 = 9 lat
Ela = 13 lat