Question

a plane flies 480 miles with wind 320 mile against wind the same length of time if the wind speed 22mph whats the speed of the plane in still air.

Answer 1

lets take x as the speed of flight
and t as the time.
(x+22)*t=480
(x-22)*t=320

by solving above equations , we can get t and x
\[
t=\frac{40}{11}
\]
\[x=110\]

Answer 2

did you plug in x with a number than subtract

Answer 3

yes....