exam Maths Puzzle Numerical Ability

Solve and check for x.

x/x-2 - x+1/x = 8/x^2-2x

I don't know how to find the LCD. Can you help?

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exam Other Question

Find the slope of the line that goes through the given points.

(-8,-9) and (-11,-16)
perform indicated multiplication and simplify
(rs)radical sign

(rs)13*(rs)5