book Maths Puzzle Numerical Ability

Hi,can you please explain in detail and help solve these?

X:9^x=3

x:2^9x-4=32

4 ___
Express as a product: log 3 /x

Thank you so much!
Jackee

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book Other Question

Help me please find the term of the expansion (x-y)^8 that contains y^7 and simplify it. Thank you so much! Rearrange the following so that the letter becomes the subject

p = n(q-2)^2; q =

Can you please show your working out, and thank you in advance