Answer :

AL2006
You have only listed one value for 'x'.

If 'x' is 2/3, then  6x  is (6 times 2/3).  That's  12/3  or  4 .
[tex]6x=6\times x=6\cdot x\\\\substitute\ x=\frac{2}{3}\ to\ 6x:\\\\6\times\frac{2}{3}=\frac{\not6^2}{1}\times\frac{2}{\not3_1}=2\times2=4[/tex]

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