book Maths Puzzle Numerical Ability

Nancy is 6 inches taller than her sister pansy. pansy is 1 foot shorter than their brother clancy. pansy and nancy both weigh less than clancy, by a total of 20 pounds. the sum of

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Please show how to do this problem


3x+6=2x-5 and

8x-6=-4+3

Thanks J (x^3-8)/(x+2)