Question 548333
dimes	x			
nickels	y						
				Total		750			
1	x	+	1	y	=	20	.............1		
10	x	+	5	y	=	135	.............2		
Eliminate 	y								
multiply (1)by 		-5							
Multiply (2) by		1							
-5	x		-5	y	=	-100			
10	x	+	5	y	=	135			
Add the two equations									
5	x				=	35.00			
/	5								
x	=	7      							
plug value of 			x	in (1)					
1	x	+	1	y	=	20			
7		+	1	y	=	20			
			1	y	=	20		-7	
			1	y	=	13			
				y	=	13