>>14277329take a deep breath, don't over think it
both resistor chains start at the same node, so they both have the same voltage across them.
The voltage divider equation is your friend here. Also remember you can combine multiple resistors. Combine them intelligently, and you can quickly whittle this problem down.
if you need practice and review, I highly recommend finding some Schaum's books on libgen. Such as "Schaum's 3000 Solved Problems in Electric Circuits" and "Schaum's Basic Circuit Analysis".
The first is exactly as it says. It's a book of worked circuits problems with full solutions.
The second book is a standard Schaum's book. Schaum's books are written to be no-frills books with no bullshit and minimal exposition. It's the kind of book you use when you've already "learned" the material, but that was months ago, and now you need to review for an exam and don't have the time to slog through the main textbook for the key points.
