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-0.25x-0.4x=39
We move all terms to the left:
-0.25x-0.4x-(39)=0
We add all the numbers together, and all the variables
-0.65x-39=0
We move all terms containing x to the left, all other terms to the right
-0.65x=39
x=39/-0.65
x=-60
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