book Maths Puzzle Numerical Ability

Divide.

15z^5 / 5z^2

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book Other Question

When the reciprocal of 3 times a number is subtracted from the reciprocal of the #, the result is one-sixth. find the number.
Thank you Solving a word problem using a linear equation

Bob's long distance phone plan has a $2 monthly fee plus 12 cents per minute. Last month, Bob's phone bill had a $14.12 charge for