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Dominic said:
Simplify: 8b - 5b - (-3b)

Answer is: (-16)

Is this correct?

Unless 6b=-16 somehow, no. What is the value are you supposed to plug in for 'b'?
 
8b - 5b - (-3b)
= 8b - 5b + 3b

You have 8 bees. Then you lose 5 bees. Then you get 3 more bees. How many bees do you have?
 
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