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3.50x+5.50=x
We move all terms to the left:
3.50x+5.50-(x)=0
We add all the numbers together, and all the variables
2.5x+5.5=0
We move all terms containing x to the left, all other terms to the right
2.5x=-5.5
x=-5.5/2.5
x=-2+0.5/2.5
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