The teacher will be very surprised to see your correct solution 😉
/ x*20\ |x + ----|*6 \ 50 / ------------ = 57600 5
(x+((x*20)*(1/50)))*(6/5) = 57600
x+x*201/50))6/5 = 57600
x = 57600 / (42/25)
sum
240000/7
=
240000/7
product
240000/7
=
240000/7
240000/7