To make the expression −8/9+[?]−g equivalent to −g, we need to find a number that, when subtracted from −8/9, gives us 0.
To solve this, we can set up the equation:
-8/9 + x = 0
To find x, we need to isolate it on one side of the equation. We can do this by subtracting -8/9 from both sides:
x = 8/9
Therefore, the number that would make the expression −8/9+[?]−g equivalent to −g is 8/9.