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y+30=2(y)
We move all terms to the left:
y+30-(2(y))=0
determiningTheFunctionDomain y-2y+30=0
We add all the numbers together, and all the variables
-1y+30=0
We move all terms containing y to the left, all other terms to the right
-y=-30
y=-30/-1
y=+30
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