It is very simple it would be positive but would remain 35
2.47 + 7.1
7.1 + 2.47
9.57-7.1
9.57-2.47
Let n be the amount of points earned in round 5
the goal of the game is to get zero when you add up the point value from all the rounds.
this means
-9 +3 + (-8)+ 2 +n =0
add up all the given numbers, then see which number(n) is required in order to get zero
any questions?