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-8.2-3x-5.1-x=-3x-3.1
We move all terms to the left:
-8.2-3x-5.1-x-(-3x-3.1)=0
We add all the numbers together, and all the variables
-4x-(-3x-3.1)-13.3=0
We get rid of parentheses
-4x+3x+3.1-13.3=0
We add all the numbers together, and all the variables
-1x-10.2=0
We move all terms containing x to the left, all other terms to the right
-x=10.2
x=10.2/-1
x=-10+0.2/1
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