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0.1-x=-1.99
We move all terms to the left:
0.1-x-(-1.99)=0
We add all the numbers together, and all the variables
-1x+2.09=0
We move all terms containing x to the left, all other terms to the right
-x=-2.09
x=-2.09/-1
x=2+0.09/1
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