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-1.6x+5=7.8
We move all terms to the left:
-1.6x+5-(7.8)=0
We add all the numbers together, and all the variables
-1.6x-2.8=0
We move all terms containing x to the left, all other terms to the right
-1.6x=2.8
x=2.8/-1.6
x=-1+1/1.3333333333333
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