Question 10
Alex and Charles both sent parcels of weight exceeding 10 kg. The postage rates Alex and Charles were both sending parcels. The postage rates are as follows: For the first 10 kg and below, the postage price is \$6 per kg; the postage price for each successive kilogram after 10 kg is \$2 lower than the original price. Given that Alex’s parcel is 20% heavier than Charles’ and his postage price is \$12 more than that of Charles, find the weight, in kg, of the parcel sent by Alex?