book Maths Puzzle Numerical Ability

please help me
Reduce the fraction 6x/12x. Would this be 1/2?

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book Other Question

an airplane took 2 hours to fly 600 km against a head wind. the return trip with the wind took 1 2/3 hours. find the speed of the plane in still air. You are working on a new temperature scale that will unify the earth. Let F denote the temperature in degrees Fahrenheit, and let X denote your new temperature scale. You want it