Hey I was wondering if you could help me find the answer to some practice questions we were given. I have a quiz tomorrow morning but I'm not even sure if I'm doing it right. Whats the point of practice questions if I don't even have the answers

I'm asked to solve exponential equations here are two of the more difficult ones I'm not sure how to do:

Attachment 30287

Could really use a small explanation, or just the steps alone so I can interpret it myself