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1.6-2x=2.1
We move all terms to the left:
1.6-2x-(2.1)=0
We add all the numbers together, and all the variables
-2x-0.5=0
We move all terms containing x to the left, all other terms to the right
-2x=0.5
x=0.5/-2
x=-0.5/2
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