book Maths Puzzle Numerical Ability

Solve x/2x-1=> 3/x+2
Rational inequality
Thank you!!

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book Other Question

Solve for :

x^2-100/x^2+12x+20 times x^2+20x+100/x-10 = 18x+99/x+2

This is a real headache I can not figure it out Derive a set of inequalities that describes the region. The picture is of a parallelogram with points (1,1), (7,2), (3,6), and (9,7). Thanks, Julie