3 + ?6 = 3  3  ?8 = 5 
?6 + 1 = 5  ?4  1 = 5 
1  ?3 = 4  6  ?13 = 7 
4 + ? + ? = ? + ? + ?3 + 3 = 3 + 3 + 3 + 7 
What do the question marks represent?
Topics: Starter  Algebra  Negative Numbers
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6  8 
6  4 
3  13 
3 (assuming all the question marks represent the same number) 
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