Ake sixazulule inkinga elandelayo yezibalo. Unogwaja ngamunye unemilenze emine kanti idada ngalinye linemilenze emibili. Uma kunezinhloko ezingu-25 nezinyawo ezingu-88, zingaki onogwaja namadada akhona?
Ake sisebenzise ama-equation ukuyixazulula! Inani lamadada makabe ngu-X nenani lezindlulamithi libe ngu-Y. Sine-X + Y = 25 futhi 2X + 4Y = 88. Ukwenza lula i-equation yokuqala, sithola u-Y = 25 - X Uma sifaka lokho ku equation yesibili, sizothola u-2X + 4 25 - X) = 88, Ngakho 100 - 2X = 88 Okusho ukuthi 2X = 100 <unk> 88 = 12, ngakho X = 6. Sibuyisela emuva ku equation yokuqala, sine Y = 25 - 6 = 19. Kukhona amadada ayisithupha nonogwaja abangu-19!