The teacher will be very surprised to see your correct solution 😉
/ 2\ |/ log(x)\ | log(x) ||-------| | ------- \\log(10)/ / log(10) 10 + x = 20
sum
10 + 1/10
=
101 --- 10
product
10 -- 10
=
1
1
x1 = 10.0
x2 = -15.6498902723066 - 19.4658762062589*i
x3 = -15.6498902723066 + 19.4658762062589*i
x3 = -15.6498902723066 + 19.4658762062589*i