Question 815195
Plane  	speed	=x	mph					
wind   	speed	=y	mph					
against 	wind   	8	hours					
with 	wind   	8	hours					
								
Distance with	wind   	6192	miles		distance against	wind   	4912	
t=d/r	against	wind   	(x-y)					
4912.00	/	(	x	-	y	)=	8.00	
								
8.00	x	-	-8.00	y	=	4912.00	....................1	
with	wind   	(x+y)						
6192.00	/	(	x	+	y	)=	8.00	
8.00	(	x	+	y	)	=	6192.00	
8.00	x	+	8.00	y	=	6192.00	...............2	
Multiply (1) by	1.00							
Multiply (2) by	1.00							
we get	2.00							
8.00	x	+	-8.00	y	=	4912.00		
8.00	x	+	8.00	y	=	6192.00		
16.00	x	=	11104.00					
/	16.00							
x	=	694	mph					
								
plug value of x in (1)				y				
8	x		-8	y	=	4912		
5552			-8	-5552	=	4912		
-8	y	=	4912					
-8	y	=	-640	mph				
	y	=	80					
Plane  	694	mph						
wind   	80	mph