Answer:
-75
Explanation:
If he played 6 games at a cost of 25 tokens per game he spent 25*6 tokens.
25*6=150
So, he lost 150 tokens.
Now we need to get how many tokens he won. For this, we just need to sum all the tokens the statement says Manuel won:
0+10+50+0+5+10=75 tokens
So, if we won 75 tokens but lost 150 tokens, the net tokens are:
75 - 150 = -75
So the change is -75, i.e., he lost 75 tokens.