x = wiek Anny24 - x= tyle lat temu Maria miała tyle lat i ile Anna ma terazx - (24 - x) =tyle wtedy lat miała Annay= wiek Marii
{y=24{24 = 2(x - (24 - x))
24 = 2(2x - 24)24 = 4x - 484x = 72{x = 18{y=24Anna ma teraz 18 lat
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x = wiek Anny
24 - x= tyle lat temu Maria miała tyle lat i ile Anna ma teraz
x - (24 - x) =tyle wtedy lat miała Anna
y= wiek Marii
{y=24
{24 = 2(x - (24 - x))
24 = 2(2x - 24)
24 = 4x - 48
4x = 72
{x = 18
{y=24
Anna ma teraz 18 lat