Question

Evaluate and simplify the expression when A=4 and b=- 1

Answer 1

Since the given expression is

`(5-2(a+3b))/(2)`

Since a = 4 and b = -1

Substitute them in the expression above

`\begin{gathered} (5-2(a+3b))/(2)=(5-2(4+3\lbrack-1\rbrack))/(2) \\ =(5-2(4+\lbrack-3\rbrack))/(2) \end{gathered}`

Simplify the bracket

`\begin{gathered} (5-2(4-3))/(2)=(5-2(1))/(2) \\ =(5-2)/(2) \end{gathered}`

Simplify the numerator

`(5-2)/(2)=(3)/(2)`

The missing is 3