book Maths Puzzle Numerical Ability

I dont understand why the 7 in the problem stays 7 in the answer.Why dont you multiply it by 7 making it 49?

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book Other Question

I need to simplify this, can you please help?

2/(x^2+4x+3)+ 1/(x+3) Tech high school surveyed its freshmen and found that 3/4 of the freshmen own an iPod. If 240 freshmen have iPods, how many freshmen attend Tech High?