Question 549237
plastic cups	x	numbers					
ceramic cups	y	numbers					
							
1	x	+	1	y	=	500	.............1
2.75	x	+	5.50	y	=	1897.50	.............2
Eliminate 	y						
multiply (1)by 		-5.5					
Multiply (2) by		1					
-5.5	x		-5.5	y	=	-2750	
2.75	x	+	5.5	y	=	1897.5	
Add the two equations							
-2.75	x				=	-852.50	
/	-2.75						
x	=	310      					
plug value of 			x	in (1)			
1	x	+	1	y	=	500	
310		+	1	y	=	500	
			1	y	=	500	
			1	y	=	190	
				y	=	190      	
plastic cups	numbers	310    					
ceramic cups	numbers	190    					
m.ananth@hotmail.ca