Question 1157244
Alicia manages to sell 12 tins of popcorn and 21 tubs of cookies for a total of $320.55

Let price of individual tin of popcorn be $x number =12
and price of 21 tubs of cookies be $y. number = 21

first day of sales
Revenue = $320.55
Equation
12x+21y= 320.55------------(1)

The second day 
15 tins of popcorn
and 32 tubs of cookies 
 total of $447.55

15x+32y=`447.55-------------(2)

Solve (1) & (2)

12.00	x	+	21.00	y	=	320.55
						
						
15.00	x	+	32.00	y	=	447.55
Eliminate 	y					
multiply (1)by		-32.00				
Multiply (2) by		21.00				
-384.00	x		-672.00	y	=	-10257.60
315.00	x		672.00	y	=	9398.55
Add the two equations						
-69.00	x				=	-859.05
/	-69.00					
x	=	12.45				
plug value of			x	in (1)		
12.00	x	+	21.00	y	=	320.55
149.40		+	21.00	y	=	320.55
			21.00	y	=	171.15
				y	=	8.15
Ans	x	=	$12.45	individual tin of popcorn		
	y	=	$8.15	21 tubs of cookies 	

CHECK
15*12.45 +8.15*32=447.55
you check other	




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