exam Maths Puzzle Numerical Ability

If the reciprocal of 4 times a number is subtracted from the reciprocal of that number, the result is 1/12. What is the number?
can it be 6

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exam Other Question
Find two consecutive even integers such that two times the first plus three times the 2nd is 76. divide and simplify

x^2-4 /x-2 divide 1/x^2-x


thank you