An rv leaving canada is stopped at customs at the border and weighed. the scale shows a reading of 2.5 tons. what is the weight of the rv in tonnes?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.