Question 803332
Planespeed	=	215	mph										
wind speed given	=	x	mph										
													
speed against	current	215	-	x									
speed with	current	215	+	x									
													
Distance against	current	540	miles										
Distance with	current	750	miles										
													
t=d/r	time against = time with		current	-									
540	/	(	215	-	x	)=	750	/	(	215	+	x	)
540	(	215	+	x 	)=	750	(	215	-x	)			
116100	+	540	x	=	161250	-	-750	x					
750	x	540	x		161250	+	-116100						
1290	x	=	45150										
/	1290												
x	=	35	mph	current	speed