6. Let x silver coins be clothes, 7/ 12(X+ 10)=X+2, and the solution is: x = 9.27. If there are x products in each box, (8x+4)/5 = (1/kloc-0). 8.( 1) As can be seen from the table, the temperature rises 15 degrees every 5 minutes, 3 degrees every minute, 63 degrees every 2 1 minute and 2 1 minute/kloc-0+63 = 73 degrees. (2) Let the temperature for x minutes be 34 degrees, then 10+3X=34 and x = 8；; 9. Suppose to produce X boxes of moon cakes, 2X large moon cakes, 0.05*2X=0. 1X Jin of flour, 4X small moon cakes, 0.02*4X=0.08X Jin of flour, 0. 1X+0.08X=4500, x = 25000/kl. 1 1, let the percentage of increase be x, (1-20%) (1+x) =1,x = 0.25 = 25%; 12, (1) set the monthly limit of x pieces, (4X+20)/4=(6X-20)/5, x = 45 (4x+20)/4 = (6x-20)/5+2, and x = 35 (3).