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-2.1x=6.09
We move all terms to the left:
-2.1x-(6.09)=0
We add all the numbers together, and all the variables
-2.1x-6.09=0
We move all terms containing x to the left, all other terms to the right
-2.1x=6.09
x=6.09/-2.1
x=-2+1/1.1111111111111
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