<PRE><B>Question 471689</B>
4	a	+	3	b	=	-5	.............1		
1	a		-1	b	=	-3	.............2		
									
multiply (1)by 		1							
Multiply (2) by		3							
4	a	+	3	b	=	-5			
3	a		-3	b	=	-9			
Add the two equations									
7	a				=	-14			
/	7								
a	=-2    				
plug value of 			a	in (1)					
4	a	+	3	b	=	-5			
-8		+	3	b	=	-5			
			3	b	=	-5	+	8	
			3	b	=	3			
				b	=	1    
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