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Verified Answer :

Let's simplify step-by-step.5b−(5b−2)
Distribute the Negative Sign:= 5b+−1(5b−2)= 5b+−1(5b)+(−1)(−2)= 5b+−5b+2

Combine Like Terms:=5b+−5b+2=(5b+−5b)+(2)
=2

So your anwser is 2!