Evaluate the expression at specific values of their variables.
Evaluate: 24 divided by a + b, when a = 6 and b = 12.
To evaluate the expression 24 divided by a + b when a = 6 and b = 12, we substitute these values into the expression and simplify:
24 ÷ (a + b)
= 24 ÷ (6 + 12)
= 24 ÷ 18
= 4/3
Therefore, the value of the expression is 4/3.