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0.5x-3.9=0.6
We move all terms to the left:
0.5x-3.9-(0.6)=0
We add all the numbers together, and all the variables
0.5x-4.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=4.5
x=4.5/0.5
x=9
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