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2u-(-1)=5
We move all terms to the left:
2u-(-1)-(5)=0
determiningTheFunctionDomain 2u-5-(-1)=0
We add all the numbers together, and all the variables
2u-4=0
We move all terms containing u to the left, all other terms to the right
2u=4
u=4/2
u=2
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