book Maths Puzzle Numerical Ability

The reciprocal of 5 less than a # is 4 times the reciprocal of twice the #. find the #.
Thank you.

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book Other Question

y=2x-4 I am struggling with inequalities that involve absolute values. Equation /y+5/<2 Does it make a difference if when removing the absolute values whether i change equation to -y-5>