book Maths Puzzle Numerical Ability

SOlve for x

2 / x+1 plus 1 = 9 / x+1

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book Other Question

A 1000 L tank now contains 240 L of water. How long will it take to fill the tank using a pump that pumps 25 L per minute? for what values of x will (x,y) be a solution of the system of the following equations
x2+y2 = 25 both intergers are squared
x+y=1