book Maths Puzzle Numerical Ability

Help....

Can you please help with simplify the rational expression to a single fraction
1-1/x-1/1+1/x+1

Thanks

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book Other Question

Factor completely
16x^2 - 2x - 3 a lawn ahs dimensions 8m by 8m. how wide a strip must be mowed around the outside edge so that exactly half of the lawn is cut? Give your answer in simplest radical for, use the square root property to solve the equation that results.