Question 803697
Plane  	speed	=x	mph						
wind   	speed	=y	mph						
against  	wind   	3	hours						
with	wind   	2	hours						
									
Distance against 		1650	miles	distance with 		1300	miles		
t=d/r	against	wind   		-					
1650.00	/	(	x	-	y	)=	3.00		
3.00	(	x	-	y	)	=	2.00		
3.00	x	-	3.00	y	=	1650.00	....................1		
									
1300.00	/	(	x	+	y	)=	2.00		
2.00	(	x	+	y	)	=	1300.00		
2.00	x	+	2.00	y	=	1300.00	...............2		
Multiply (1) by	2.00								
Multiply (2) by	3.00								
we get									
6.00	x	+	-6.00	y	=	3300.00			
6.00	x	+	6.00	y	=	3900.00			
12.00	x	=	7200.00						
/	12.00								
x	=	600.00	mph						
									
plug value of x in (1)				y					
3.00	x		-3.00	y	=	1650.00			
1800.00			-3.00	-1800.00	=	1650.00			
-3.00	y	=	1650.00						
-3.00	y	=	-150.00	mph					
	y	=	50.00						
Plane  	speed	600.00	mph						
wind   	speed	50.00	mph						
									
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