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7142.2-183.8x=5671.8
We move all terms to the left:
7142.2-183.8x-(5671.8)=0
We add all the numbers together, and all the variables
-183.8x+1470.4=0
We move all terms containing x to the left, all other terms to the right
-183.8x=-1470.4
x=-1470.4/-183.8
x=+8
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