Book Maths Puzzle Time Distance and Speed

It takes an airplane 1h 30min to fly 600km aginst the wind. The return trip witht the wind takes only 1h. Find the total flying time for the round trip if there was no wind.

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how do you work this problem
Order of Operations
2x(y+3)= 2x(y)+ 2x(3)= 2xy +6x


and


[5-2(5*2)]/[(20)/2]+ 5 1. Solve the equation: 2x^3 + 6x= 8x^2

2. Explain why it is incorrect to solve the equation (y-2) (y+2) =4 by setting y-2=2 and y+2=2 and solving the resulting equations.

Tha