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1.389-3x+50=939
We move all terms to the left:
1.389-3x+50-(939)=0
We add all the numbers together, and all the variables
-3x-887.611=0
We move all terms containing x to the left, all other terms to the right
-3x=887.611
x=887.611/-3
x=-295+2.611/3
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