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4u-(-2)=18
We move all terms to the left:
4u-(-2)-(18)=0
determiningTheFunctionDomain 4u-18-(-2)=0
We add all the numbers together, and all the variables
4u-16=0
We move all terms containing u to the left, all other terms to the right
4u=16
u=16/4
u=4
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