a+b+c=774 Inlocuim cu celelalte b×2+12 + b + a+b = 774 Inlocuim si celalalt a b×2+12 + b + b×2+12+b = 774 Adunam b-urile b×6 + 12 + 12 = 774 b×6 + 24 = 774 b×6=750 b=125 a=262 c=387

a+b+c=774 a=b×2+12 c=a+b c=b×2+12+b c=2b+12+b c=3b+12 2b+12+b+3b+12=774 2b+b+3b=774-12-12 6b=750 b=750:6 b=125 a=2b+12 a=2×125+12 a=250+12 a=262 c=3b+12 c=3×125+12 c=375+12 c=387