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347.50+100=45x
We move all terms to the left:
347.50+100-(45x)=0
We add all the numbers together, and all the variables
-45x+447.5=0
We move all terms containing x to the left, all other terms to the right
-45x=-447.5
x=-447.5/-45
x=9+12.142857142857/12.857142857143
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