book Maths Puzzle Numerical Ability

sum of two numbers is 49 and the difference is 25

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book Other Question

A plane travels with a tail wind (100) miles to the nearest town in (60) minutes. The plane then travels back (100) miles with a head wind. The travel time is (40) min more than the first trip. What is the speed of the wind, and the speed of the plane? what is th answer to x+2=4 how do u solve it ?