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5.5+y=9.0
We move all terms to the left:
5.5+y-(9.0)=0
We add all the numbers together, and all the variables
y+5.5-9=0
We add all the numbers together, and all the variables
y-3.5=0
We move all terms containing y to the left, all other terms to the right
y=3.5
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