book Maths Puzzle Numerical Ability

The sum of a number and 4 times its reciprocal is 25 over 6...


equation is: X+4(1/X)+25/6... but how do I solve this?

Thank you!

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book Other Question

The point (1,2) has the distance from the line defined by

{{{y=-(x/3+1)
Please....Find the vertex,focus, and directix of the graph of the equation
8(y+2)=(x+6)^2