Book Maths Puzzle Algebra

(X^2+2x-15/x^2-7x+12)/(x^2+11x+30/16-4x)

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An experienced painter made $600 for working on a certain job. His apprentice, who makes $3 per hour less, also made $600. However, the apprentice worked 10 hours more then the painter. How much does the painter make per hour? An aircraft with a constant speed in still air travels 3000km with a constant tailwind in 3 hrs. With the same wind now against the aircraft, it takes 4 hours to make the return tr