Question 723727
1	x	+	1	y	=	33	.............1	
Total value								
5	x	+	20	y	=	375	.............2	
Eliminate	y							
multiply (1)by		-20						
Multiply (2) by		1						
-20	x		-20	y	=	-660		
5	x	+	20	y	=	375		
Add the two equations								
-15	x				=	-285		
/	-15							
x	=	19						
plug value of			x	in (1)				
1	x	+	1	y	=	33		
19		+		y	=	33		
				y	=	33		-19
				y	=	14		
				y	=	14		
x=	19		number of 5 cent coins					
y=	14		number of 20 cent coins