Welcome to PF.
Your diagram is a little confusing because the visualization of the moment arms is inconsistent.
The red is shown shorter when in fact it's moment arm is longer 3/2 > 4/5.
If it is in equilibrium then 2*4/5 = x*3/2 ==> x = 16/15
I'd go with the numbers as the schematic is merely a visual aid.
Separate names with a comma.