book Maths Puzzle Numerical Ability

Please can you help me I,m new to imequalities and Idon't get this:x-4-2(x+4)<0
A.x>-12
B.x<-12
C.x<7
D.X<12
Thank You!

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book Other Question

Question involvin radicals: parentheses, 6*sq.root of 2 minus 2* sq. root of 6, parentheses, everything squared. If an annual rate of 7.5% in simple interest is charged on a loan of $290 and no payments are made for 9 months, to the nearest whole cent how much is owed?