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r-7/2=42
We move all terms to the left:
r-7/2-(42)=0
determiningTheFunctionDomain r-42-7/2=0
We multiply all the terms by the denominator
r*2-7-42*2=0
We add all the numbers together, and all the variables
r*2-91=0
Wy multiply elements
2r-91=0
We move all terms containing r to the left, all other terms to the right
2r=91
r=91/2
r=45+1/2
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