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80.4x+11=91.4
We move all terms to the left:
80.4x+11-(91.4)=0
We add all the numbers together, and all the variables
80.4x-80.4=0
We move all terms containing x to the left, all other terms to the right
80.4x=80.4
x=80.4/80.4
x=1
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