The answer is B. 100/5=20 hope i helped
        
             
        
        
        
Yes
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Yes
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This is because in order to be addition property of equality they have to add/ subtract by the same exact amount on both sides.
        
             
        
        
        
m = t2.5
So money equals to tickets sold*2.5
2.5 is each tickets price
If you ask how I found;
$100 / 40 tickets = $2.5