some short and selected math problems of different levels in random order I try to keep the ans simple
Because RHS is integer so LHS is integer
As \lfloor 2x \rfloor and \lfloor 3x \rfloor are integers so x is integer so \lfloor 2x \rfloor = 2x and \lfloor 3x \rfloor = 3x
so x + 2x + 3x = 6x = 7 so x = \frac{7}{6} which is not integer so NO solution
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