SAN DIEGO - Gateway Inc., hoping to reverse its sagging fortunes in the personal computer business, said Friday it would buy privately held eMachines Inc. in a deal valued at $235 million. The combined company would create the third-largest PC company in the U.S. market _ still far behind Dell Inc. and Hewlett-Packard Co. _ and give Gateway a stronger presence in low-end computers. "We've always struggled at the low end of the PC business," said Rod Sherwood, Gateway's chief financial officer. The agreement came one day after Gateway posted its 12th loss in 13 quarters, a result of...