exam Maths Puzzle Numerical Ability

3logx+3=1

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exam Other Question

Hi,
1: Multiply and reduce the algebraic fractions.
(X^2-3X-4/X) (2X^2/X-4).
2: Subtract and reduce the algebraic fractions.
(3/X-5)-(2/X)
Thanks A TON! if the temp. at noon is 78 degrees and at 5:00 it is 58 degrees how much did the temp. change each hour