Solution:
Given;
[tex]d=(r-c)t[/tex]
Also;
[tex]d=6,r=6,t=2[/tex]
Substitute the values in the formula, we have;
[tex]6=(6-c)2[/tex]
Divide both sides by 2;
[tex]\begin{gathered} \frac{6}{2}=\frac{(6-c)2}{2} \\ \\ 3=6-c \end{gathered}[/tex]
Collect like terms;
[tex]\begin{gathered} c=6-3 \\ \\ c=3 \end{gathered}[/tex]
ANSWER: c=3
