<PRE><B>Question 420093</B>
5	r		-3	s	=	17	.............1	
3	r	+	5	s	=	51	.............2	
								
multiply (1)by 					5			
Multiply (2) by					3			
25	r	+	-15	s	=	85		
9	r	+	15	s	=	153		
								
Add the two equations								
								
34	r	+	0	s	=	238		
								
/	34							
								
r	=	7						
								
plug value of r in (1)								
								
5	r	+	-3	s	=	17		
35		+	-3	s	=	17		
			-3	s	=	17-35
			-3	s	=	-18		
				s	=	6		
</PRE>