Question 680811
6% bond investment be x
8% bond investment be y

x+y = 16000.................(1)

6%x+580=8%y

multiply by 100
6x+58000=8y
6x-8y=-58000................(2)

solve simultaneously

1	x	+	1	y	=	16000	.............1	
								
6	x		-8	y	=	-58000	.............2	
Eliminate	y							
multiply (1)by		8						
Multiply (2) by		1						
8	x		8	y	=	128000		
6	x		-8	y	=	-58000		
Add the two equations								
14	x				=	70000		
/	14							
x	=	5000						
plug value of			x	in (1)				
1	x	+	1	y	=	16000		
5000		+		y	=	16000		
				y	=	16000		-5000
				y	=	11000		
				y	=	11000		
x=	5000						
y=	11000	

$	5000	@ 6%					
$	11000	@8%						
m.ananth@hotmail.ca