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y - lata panowania
(x+9) * 2/3 = y+9
(x-14) * 1/2 = y-14
(x+9) * 2 = 3y+27
x-14 = 2y-28
2x+18 = 3y+27
-2x+28 = -4y+56
2x-3y = 9
-2x+4y = 28
y = 37
x - 14 = 74-28
x = 60
odp.: żył 60 lat, panował 37 lat