exam Maths Puzzle Numerical Ability

I need help solving this question: Find all solutions of x^1/log x=5

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exam Other Question

In the year 1998, there were -4.57 times 10 to the 7th power- cars in America. The population of America was -2.3 times 10 to the 6th power-. What was the average number of cars per person in America in 1998?
A. 0.5
B. 1.98
C. 5
D. 19.8
I am having problem,s with this problem

Solve the following equation by factoring or by any of the techniques.

4x^2-8x+3=5

Thank a million for the help