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8.31x+88.9=396.38
We move all terms to the left:
8.31x+88.9-(396.38)=0
We add all the numbers together, and all the variables
8.31x-307.48=0
We move all terms containing x to the left, all other terms to the right
8.31x=307.48
x=307.48/8.31
x=37+0.00999999999999/8.31
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