exam Maths Puzzle Numerical Ability

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1)Work. Henry sold 120 magazine subscription in x + 2 days. If he sold at the same rate for another week, Then how many magazines did he sell in the extra

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Could I havehelp with this problem please* Find an equation of variation for the given situation. y varies inversely as the square of x, and y=6 when x=3 3x/(x+3)+ 9/(x+3)