If a complex equation has real roots, what does that mean

If a complex equation has real roots, what does that mean

There's no particular conclusion. It's like having other roots
It's this root that satisfies the equation

15 right 1 / 3 minus 4 right 1 / 6 minus 2 right 1 / 2 is equal to how much?
There are: (1) (3 right 8:5 plus 2 right 9:5) plus 1 right 8:3 is equal to? (2) 4 right 3:2 minus 1 right 4:3 is equal to? (3) 2 right 2:1 plus 3 right 3:2 plus 4 right 4:3 is equal to? There is a reward. The number of the question is clearly written

Eight and two-thirds,
(1) 7 and 5 / 9,
(2) 2 and 11 / 12,
(3) 10 and 11 / 12,

How to do 4 out of 15 minus 1 out of 6 minus 4 out of 15 plus 5 out of 6?
It's a toroidal calculation

4/15 -1/6-4/15+5/6
=4/15 -4/15 -1/6+5/6
=-1/6 +5/6
=4/6
=2/3