For this case, the first thing we must do is define variables:
p: plane speed
w: wind speed
With the wind in favor, the speed is:

With the wind against the speed is:

Rewriting both equations, we have the following system of equations:

Then, solving the system of equations (graphically for example), we have the solution is:

Therefore, jet stream's speed:
Answer:
A) p + w = 960; p - w = 600; jet stream's speed = 180 km / h
Answer:
the answer is 6C+24 or if you divide 6 on both sides c+4
examples/expressions:
1. 4(1.5c+6)
2. 3(2c+8)
3. 2(3c+12)
4. 12(0.5c+2)
58 ÷ 6 = 9/2/3
i am a mathematics teacher. if anything to ask please pm me
Answer:
under the condition of f(x)=x composite function is an identity one