book Maths Puzzle Numerical Ability

solve equation:5/n+1/10=44/5n
2.subtarct rational expression to the simplest from:13/14x-9/10x

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book Other Question
find the area, in cm2 of a triangle whose base is 18cm and whose height is 25cm? 50=15-6(2x-5)


and


3(-6x+9)-10x=1