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149.1-8.3x=3.7x+39.9
We move all terms to the left:
149.1-8.3x-(3.7x+39.9)=0
We get rid of parentheses
-8.3x-3.7x-39.9+149.1=0
We add all the numbers together, and all the variables
-12x+109.2=0
We move all terms containing x to the left, all other terms to the right
-12x=-109.2
x=-109.2/-12
x=9+1/10
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