Respuesta :

The difference of a number (y) and 9 is written as

[tex]y-9[/tex]

Then, twice the difference of a number and 9 is

[tex]2(y-9)[/tex]

Finally, set the later expression to be equal to 6,

[tex]\Rightarrow2(y-9)=6[/tex]

The equation is 2(y-9)=6