解:原式=(82/9+15/8-41/7)÷(82/9-48/7+X) =[(82×8×7+15×9×7-41×9×8)/(9×8×7)]÷[(82×7-48×9+X)/(9×7)] =(82×8×7+15×9×7-41×9×8)/(82×7×8-48×8×9+8X) =1你题目没打完!!!!!!!!