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-5.4-7.8x=78.808
We move all terms to the left:
-5.4-7.8x-(78.808)=0
We add all the numbers together, and all the variables
-7.8x-84.208=0
We move all terms containing x to the left, all other terms to the right
-7.8x=84.208
x=84.208/-7.8
x=-10+5.1390728476821/6.4569536423841
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