Question 435084
	coffee type II		x lbs					
	coffee type II	------------y lbs					
x+y=	40	.............1		
3.2x+6.2y=158	.............2		
Eliminate y									
multiply (1)by 	-6.2							
Multiply (2) by	1							
-6.2	x	-6.2	y	=	-248			
3.2	x	6.2	y	=	158			
Add the two equations									
-3x=-90			
/-3								
x=30 lbs coffee type II			
plug value of 			x	in (1)					
x+y=40	
30+y=40			
y=40-30
y=10	lbs of coffee type II