Part two I neeed help

Math each whole number with a rational,exponential expression

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.

What is the length and width of a 84.5 square foot rug? will mark