140/9 0.3 20 8 0.2 4.8 23/3
(1)15.56 (2)0.3 (3)20 (4)8 (5)0.2 (6)4.8 (7)7.67
9X=140X=9/140,16X=4.5X=4.5/16,9X=180X=20,2X=16X=8,5.2X=1.08,X=1.08/5.2,16X=72X=72/16。,60X=460X=460/60