Question 419049
let T shirts cost $x
Let banners cost y
...
13x+10y=145
15x+6y= 141

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13x+10y	=145	.............1	
15x+6y=	141	.............2	
								
multiply (1)by 	3			
Multiply (2) by	-5			
39x+30y	=435		
-75x-30	y=-705		
								
Add the two equations								
								
-36x=-270		
/-36							
								
x= $7.5						
								
plug value of x in (1)								
								
13x+10y	=145		
97.5+10y=145		
10y=145	-97.5
10y=47.5		
y= $4.75