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-4.5=x+1.9
We move all terms to the left:
-4.5-(x+1.9)=0
We get rid of parentheses
-x-1.9-4.5=0
We add all the numbers together, and all the variables
-1x-6.4=0
We move all terms containing x to the left, all other terms to the right
-x=6.4
x=6.4/-1
x=-6+0.4/1
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