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3.16=x+9
We move all terms to the left:
3.16-(x+9)=0
We get rid of parentheses
-x-9+3.16=0
We add all the numbers together, and all the variables
-1x-5.84=0
We move all terms containing x to the left, all other terms to the right
-x=5.84
x=5.84/-1
x=-5+0.84/1
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