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4.5a-1+a=11
We move all terms to the left:
4.5a-1+a-(11)=0
We add all the numbers together, and all the variables
5.5a-12=0
We move all terms containing a to the left, all other terms to the right
5.5a=12
a=12/5.5
a=2+1/5.5
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