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-1.6x=6.4
We move all terms to the left:
-1.6x-(6.4)=0
We add all the numbers together, and all the variables
-1.6x-6.4=0
We move all terms containing x to the left, all other terms to the right
-1.6x=6.4
x=6.4/-1.6
x=-4
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