exam Maths Puzzle Numerical Ability

simplify
a)
5
____
12xy

+
3
_
4x

b)
r
__
r-5

-

5
_
r-5

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exam Other Question

Find all solutions to the equation tanx = 1. Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.
6(x - 1) > 18