The teacher will be very surprised to see your correct solution 😉
623 17*(-1) --- + ------- = x 50 10*5
(623/50)-(1/5)*(17/10) = x
623/50-1/517/10 = x
303/25 = x
x = -303/25 / (-1)
303 x1 = --- 25
x1 = 303/25
sum
303 --- 25
=
product
303/25
x1 = 12.12