book Maths Puzzle Numerical Ability

solve beware of extraneois solutions 10/(x(x-2)) + 4/x = 5/(x-2)

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book Other Question

A strip of wood 66 inches long is to be cut into 5 1/2-inch pieces. How many pieces can be cut? Restar a-b de b-a
x-y de 2x+3y
-5a+b de -7a+5