To find which term of the sequence has a value of 5, we can set the expression for the nth term equal to 5 and solve for n:
\[ 50 - 3n = 5 \]
Subtract 50 from both sides:
\[ -3n = -45 \]
Divide both sides by -3:
\[ n = 15 \]
So, the term with a value of 5 in the sequence corresponds to the 15th term.