exam Maths Puzzle Numerical Ability

3x + 6x-9 -6 = 0 for x
over x-1 over x-1

3x over x-1 plus 6x-9 over x-1 minus 6 equals 0 solve for x?

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exam Other Question

how do I use the concept of slope to determine if a given figure is aparallelogram or a rectangle. Thank you so much for your help FOIL
(5z-u)(3z+3u)
this is my answer is it correct?
15z^2+12zu-3u^2