The teacher will be very surprised to see your correct solution 😉
263 689
--- ---- 77*103
250 1000 ------*600
27*x 39*x 100*(-2) 500 3
------- - -------- + -------- - ---------- - --- = 0
1000 500 25 /1851*24\ 100
|-------|
\ 20 /