exam Maths Puzzle Numerical Ability

19a-3(n+3)=9 whats n??

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exam Other Question

Celestine bought two pieces of cotton rope, one measuring 34 inches and the other 38 inches in length. The price of both was the same, 40 cents per yard. How much did she pay for both pieces? Help!!!

Simplify:
[2x^2-x-3] / [3x^2-7x+4] divided by [2x^2+x-6] / [3x^2+2x-8]