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16.8-x=4x
We move all terms to the left:
16.8-x-(4x)=0
We add all the numbers together, and all the variables
-5x+16.8=0
We move all terms containing x to the left, all other terms to the right
-5x=-16.8
x=-16.8/-5
x=3+1/2.77777777778
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