book Maths Puzzle Numerical Ability

Hi I am having trouble with this question. Can you help?

9^(4x-3)=4^(2x-4)

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book Other Question

I am a two digit number. My ones and tens digits are the same. The sum of my digits is 8. What number am I? With the major options package and destination charge, a sports car cost $24,416. The base price of the car was ten times the price of thr major options package and fifty times the destination charge. What was the base price of the car?