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-27.9=-3.1x
We move all terms to the left:
-27.9-(-3.1x)=0
We get rid of parentheses
3.1x-27.9=0
We move all terms containing x to the left, all other terms to the right
3.1x=27.9
x=27.9/3.1
x=9+-3.5527136788005E-15/3.1
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