exam Maths Puzzle Numerical Ability

Could you please help me with the following problem? I am supposed to solve this equation using the quadratic formula. (1/y)-(1/y+5)=(1/4)

Thank you very much for any help you can provide.

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exam Other Question

A grocer wished to blend candy selling for $1.20 per pound with candy selling for $1.80 per pound to get a mixture that will sell for $1.40 per pound. How many pounds of the $1.20 if p=x+y/x-y and q=x-y/x+y then find the value of P-Q/P+Q-P+Q/P-Q