book Maths Puzzle Numerical Ability

simplify this problem

9x^3-3x^2
_________
3x

thanx

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book Other Question

this one i have no clue!!
two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. find the probability that both marbles are white.
thanks, your a great help!!
two thirds X plus four equals nine
2/3 x + 4 = 9 how do you solve and do the work?