exam Maths Puzzle Numerical Ability

so you have a cube that is x by x by x you slice a one inch slice off it and the remaining volume is 294 what is x

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exam Other Question
Solve and check each of the following equations for x.

(2)/(x+ 2)=(3)/(x+ 6)+(9)/(x^2 +8x+ 12) x squared plus 12x plus 27