book Maths Puzzle Numerical Ability

I just wanted to know if I did this problem right. Please e-mail me the answer so I can check it out thanks.

1 / radical x + 2 / x

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book Other Question

how do you use elimination to solve for the x and the y
11x - 5y = 80
9x - 15y = 120 How do I figure out a percentage? Is it the larger number divided by the smaller number or the smaller number divided by the larger number times 10?