book Maths Puzzle Numerical Ability

Simplify the rational expression

(x-5/x^2+2x-3)-(x-1/x^2+6x+9

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book Other Question

A right triangle has one leg that is 7 centimeters. The hypotenuse is 25 centimeters. Find the length of the other leg. solve by addition

2/3x - 1/2y=2

1/3x + 1/4y=3

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