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⅓m+¼n -jedna dwunasta m + jedna dwudziesta czwarta n - jedna dwunasta m = 4/12 m + 7/24n
0,05x-0,07x² + 1,2 x²-0,07x-1,05x²= -0.02x + 0.07x²
6x² + 0,5 - 0,25x - 8x² + 5 = -2x² +5.5 - 0,25x
6x+7y-9z = 6 × 3 + 7 × (-2) - 9 × (-5) = 18 + (-14) + 45 = 49
6x+7y-9z = tu nie podałeś ile y jest