Easy
Which equation has no solution?
3x+1=3x−13 x+1=3 x-13x+1=3x−1
3x−1=x+33 x-1=x+33x−1=x+3
3−x=−3x3-x=-3 x3−x=−3x
3x=3x3 x=3 x3x=3x
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