exam Maths Puzzle Numerical Ability

Given that (3x-a)(x-7)=3x^3-32x^2+81x-70, determine the value of a.

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i m thinking of 3 consecutive odd integer. the sum of the first and last of these integers is 26. what are the integers Hadley Electronics is marketing a new kind of stero. Total revenue is the total amount of money taken in. The firm determines that when it sells x stereos, it will take in 280x-0.4