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1.9=x-8
We move all terms to the left:
1.9-(x-8)=0
We get rid of parentheses
-x+8+1.9=0
We add all the numbers together, and all the variables
-1x+9.9=0
We move all terms containing x to the left, all other terms to the right
-x=-9.9
x=-9.9/-1
x=9+0.9/1
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