book Maths Puzzle Numerical Ability

solve for x

1/x-5 + 1/x-12 = 1/x-17x+60

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book Other Question

12
______
r + 4

________

11
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6r + 24 The diagonal of a rectangle measures 62.2 millimeters.The leangth is five times as long as the width.What is the width of the rectangle?