The unknown number is X;
x/6+2=9;
X/6=7;
X=42;
The answer is 42

<em>Evaluate 1/4c+3d when c=6, and d=7.</em>
<em />
<em> </em>
Replace c with 6, and d with 7:-

On simplification,

On further simplification,

On further simplification,

Adding the numerators,

Finally, Reducing the fraction:-


<h3>Good luck with your studies.</h3>

It's 180 inches of wrapping paper.