exam Maths Puzzle Numerical Ability

can you help me factor this problem. 15X^2-19x+6. thanks ahead of time!

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A ski lift has a seat suspended from a wire above. Three skiers with masses of 70 kilograms, 82 kilograms, and 20 kilograms are riding the lift. The seat itself has a mass of 17 kilograms. What is the total force exerted on the wire above?
margaret is twice as old as jenny, and sarah is twice as old as margaret. Their combined ages total 133 years. How old is each person? in equation form