Question 940042
let one investment be x
and other y
1	x	+	1	y	=	15000	.............1		
									
4.50	x		-8	y	=	250	.............2		
Eliminate	y								
multiply (1)by		8							
Multiply (2) by		1							
8	x		8	y	=	120000			
4.50	x		-8	y	=	250			
Add the two equations									
12.50	x				=	120250			
/	12.50								
x	=	9620							
plug value of			x	in (1)					
1	x	+	1	y	=	15000			
9620		+		y	=	15000			
				y	=	15000		-9620	
				y	=	5380			
				y	=	5380		1	
x=	9620						
y=	5380						
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