Question 436425
--------Price	------------	Numbers
Coffee I 1	----------------x
Coffee II 3.25	----------------9-x
Total	2.75	----------------9		
x+3.25(9-x)=2.75*9
x+29.25-3.25x=24.75		
x-3.25x	=24.75-29.25		
-2.25x=	-4.5							
/-2.25									
x=2 ===>$1.00
7====>3.25%