Calculate the value of the expression when [[$ x = 7 $]].

a) [[$ \displaystyle\frac {2 + x} {4} $]]

Answer: The value of the expression is .

b) [[$ \displaystyle\frac {x - 8} {2} $]]

Answer: The value of the expression is .

c) [[$ \displaystyle\frac {3x} {5} $]]

Answer: The value of the expression is .

d) [[$ \displaystyle\frac {x} {2x} $]]

Answer: The value of the expression is .