I did a really really long solution. But the short version is 9x-20=16 because they’re both MO they shud be equal to each other. Then you get that x is 4.
Then plug 4 in for 3x-4 which is 8.
And then also plug 4 in for 9x-20 which looks like 9(4)-20, you get 16
The answers 8 is the half of 16 just like in the diagram where ZX IS THE HALF OF MO.
P.s I used 3x-4 for zx which is the half of MO because zx and yX are congruent to each other(they have the same length).
