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1.6=x/3.9
We move all terms to the left:
1.6-(x/3.9)=0
We add all the numbers together, and all the variables
-(+x/3.9)+1.6=0
We get rid of parentheses
-x/3.9+1.6=0
We multiply all the terms by the denominator
-x+(1.6)*3.9=0
We add all the numbers together, and all the variables
-1x+6.24=0
We move all terms containing x to the left, all other terms to the right
-x=-6.24
x=-6.24/-1
x=6+0.24/1
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