题目

GIANYAR，Bali—The resort island of Bali is known for a lot of things—beaches, artists, flowing rice paddies—but not guitars. Slowly but surely, Wayan Tuges is changing that. A wood sculptor who works from a small workshop in one of the artisan-filled villages of central Bali, Mr. Tuges has produced hundreds of custom-made guitars over the past several years which have become collector’s items across the world. Their success—some sell for as much as $8,800—has also shown how the entrepreneurs(企业家）even in remote comers of the world can connect to the global economy 已知2.12x+3.13y=60，则21.2x+31.3y-300=________．