Question 1182442
	x	Number of half T shirts							
	y	Number of Full T shirts							
									
									
	x	+		y	=	40.00			
									
									
9.90	x	+	12.75	y	=	421.65	.............2		
Eliminate 	y								
multiply (1)by		-12.75							
Multiply (2) by		1							
-12.75	x		-12.75	y	=	-510.00			
9.90	x		12.75	y	=	421.65			
Add the two equations									
-2.85	x				=	-88.35			
/	-2.85								
x	=	31.00							
plug value of			x	in (1)					
	x	+		y	=	40			
31.00		+		y	=	40			
				y	=	9			
				y	=	9			
Ans	x	=	31						
	y	=	9.00						
	31	Number of half T shirts							
	9	Number of Full T shirts