exam Maths Puzzle Numerical Ability

Solve: [n/(n-4)]+n=(12-4n)/(n-4).

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exam Other Question

A store is selling Compact Discs (CDs)for $10.50 and $8.50. You buy 10 cds for $93. How many cds bought at each price? I am having a hard time on this multiple choice problem can someone please help me?
Solve. 5(x - 2)^2 = 3

a +-59/25

b 1/5,19/5

c 10+-square root 15 over 5

d 10+- square root 3 over 5