exam Maths Puzzle Numerical Ability

This questions is a logarithm it is
2/3 (lnx^2-9)-ln(x-3))+ln(x+y)

The answer that I came up with is x=3?

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exam Other Question

Help!!Is my solution correct?
If not, please let me know where I went wrong?
x^2-5x-14 divided by 4-x^2

My solution is 1-1 (x^2 - 4)

thanks a bunch!!!
solve the system of linear equations
What is x?
5x+2y= -7
What is y?
x+3y=9