book Maths Puzzle Numerical Ability

can you show me how to simplify 11-(3x-6)+2(4x+5)-x

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book Other Question

I need help on finding the probability of drawing a spade and then a club from a standard 52 card deck (without replacement) My problem is solve the equation for the variable A. As well as show how to get to that solution.

A with the exponent of 2 times B = C