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6x + 2 * 6 = 8x - 3 * 8
6x + 12 = 8x - 24
6x - 8x = -24 - 12
-2x = -36
x = 18
liczba kur:
6 * 18 + 12 = 120
Odp.: W kurniku jest 18 grząd i 120 kur.