Question 1176816
Quarters = x
Dimes = y

Number of coins

1.00	x	+	1.00	y	=	100.00

Amount						
						
25.00	x	+	10.00	y	=	1300.00
Eliminate 	y					
multiply (1)by		-10.00				
Multiply (2) by		1.00				
-10.00	x		-10.00	y	=	-1000.00
25.00	x		10.00	y	=	1300.00
Add the two equations						
15.00	x				=	300.00
/	15.00					
x	=	20.00	- quarters			
plug value of			x	in (1)		
1.00	x	+	1.00	y	=	100.00
20.00		+	1.00	y	=	100.00
			1.00	y	=	80.00
				y	=	80.00 ---- Dimes