book Maths Puzzle Numerical Ability

x = (3x-5)
2 4

I have tried every thing and cant figure it out please help

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help me out with this equation from the GRE ETS book .... I don't understand the result.

2^30 - 2^29
____________ = 2^28
2

THANK YOU SO MUCH!!!!!!!!!!!! Solve for k: 5{(3-2k)+k}-6 = 2k-4(-3k-2)-12. Express your answer as a simplified fraction. PLEASE HELP!