This is an easy algebra problem. I believe clever jgh must can solve it in 1min!

We know that and

  1. What is the value of ?

  2. What is the value of ?

My hape solution is below the picture

My hape solution below!

This is my hape solution:

Similarly

Then we devide the upper thing by because if then the second upper thing must equal.

Finally we got

Similarly

So

Then plug those two upper things into and got

I think mk must have a better solution!! If you have, please send another blog to let me see clearly! Thank you!