book Maths Puzzle Numerical Ability

simplify completely: (x-(x/2))/3-(1/x))

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book Other Question

Hello, I"m not sure if this is the right topic for this but how do you tell what property or like reflexive, substitution, transitive, and so on how can you tell what you use for e (5m+5)=7-2m I NEED HELP!!!!!
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