exam Maths Puzzle Numerical Ability

I need to solve the inequality, but I am getting confused with the fractionin the problem.

2/3(12-x)>4
thank you

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exam Other Question

x^-2x-48=0 A is eleven times as old as B. in a certain number of years, A will be five times as old as B, and in five years after that she will be three times as old as B. how old are they now.