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Translate the sentence into an equation.Twice the difference of a number and 9 equals 6.Use the variable y for the unknown number.

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


y-9

Then, twice the difference of a number and 9 is


2(y-9)

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


\Rightarrow2(y-9)=6

The equation is 2(y-9)=6

User GregD
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