Question 548387
	cost/unit								
pizza	x								
soft drink	y								
				Total		750			
8	x	+	7	y	=	34.29	.............1		
5	x	+	7	y	=	24.87	.............2		
Eliminate 	y								
multiply (1)by 		-1							
Multiply (2) by		1							
-8	x		-7	y	=	-34.29			
5	x	+	7	y	=	24.87			
Add the two equations									
-3	x				=	-9.42			
/	-3								
x	=	3.14							
plug value of 			x	in (1)					
8	x	+	7	y	=	34.29			
25.12		+	7	y	=	34.29			
			7	y	=	34.29		-25.12	
			7	y	=	9.17			
				y	=	1.31			
pizza	$	3.14							
soft drink	$	1.31							
m.ananth@hotmail.ca