It would be the last option, (5, -4)
Easy just add up the steps, if both of them scored 8 and one scored by 4 just add em up.
20 bicycles. two tires per one bike. 2*10=20
Had -9-x^2
———
x^2
adh (-9-x^2)
——————-
x^2
-9adh-adhx^2
———————
x^2
9adh+adhx^2
- ———————
x^2
Hope this helps
