exam Maths Puzzle Numerical Ability

6-b=5b+30

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exam Other Question

How would I solve this for kj?:

ln(kj/15) = 2ln(kj/60)

The answer is kj = 240, but I am unsure as to how to get there. Thanks for your help.
sketching this graph of P(x)=X5(X+2)3 (X-3)4 (X-5)3
the numbers after the X and outside the parenthesis are the small numbers i.e x square but I have no idea how to do this little numbers on my computer