We must do Divided by 6.78 to the expression x•6.78 to make it equal x.
So option D is correct.
WE can simply replace those variables with the value you know of them and then operate on those values to get a final value. This is the result of that expression at those values of the considered variables.
WE have to find the expression x•6.78 to make it equal x.
Let consider x•6.78 = x
To make them actually equal to each other we have to remove the 6.78 .
Thus, when we divide by x•6.78 on left side then we get ,
x•6.78/6.78 = x
Therefore, We must do Divided by 6.78 to the expression x•6.78 to make it equal x.
So option D is correct.
Learn more about evaluating a function at a value here:
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