Question 870651
Plane speed	=	210	mph										
wind speed given	=	x	mph										
													
speed against	wind	210	-	x									
speed with	wind	210	+	x									
													
Distance against	wind	297	miles										
Distance with	wind	363	miles										
													
t=d/r	time against = time with		wind	-									
297	/	(	210	-	x	)=	363	/	(	210	+	x	)
297	(	210	+	x 	)=	363	(	210	-x	)			
62370	+	297	x	=	76230	-	-363	x					
363	x	297	x		76230	+	-62370						
660	x	=	13860										
/	660												
x	=	21	mph	wind	speed