Help me please hurry

Question

An airplane travels 5096 kilometers against the wind in 7 hours and 5796 kilometers with the wind in the same amount of time. What is the rate of the plane still air and what is the rate of the wind

Answer 1

5096/(r-w) = 7

728 = r-w is equation No. 1

5796/(r+w) = 7

828 = r+w is equation No.2

add Equation 1 and 2 to get

1556 = 2r

r = 1556/2 = 778 km per hour for the plane's speed in still air

w = 828-778 = 50 km per hour for wind speed