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-7-1.2x+19+7.7x=x
We move all terms to the left:
-7-1.2x+19+7.7x-(x)=0
We add all the numbers together, and all the variables
5.5x+12=0
We move all terms containing x to the left, all other terms to the right
5.5x=-12
x=-12/5.5
x=-2+1/5.5
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