exam Maths Puzzle Numerical Ability

5-3x over x^2-2x+1 - x-1 over x^2-2x+1 =

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Separate 65 into two parts such that 3 times the larger will be 6 more than 6 times the smaller. What percent of weight Na2s203 is sulfur (S)? (na 23, S 32 O 16)?