It is agreed that the notation [[$ a | b | c $]] has the same meaning as the expression [[$ \displaystyle\frac {a - b} {b - c} $]]. What is the value of [[$ 2|3|4 $]]? Solve the equation [[$ 6|x|4 = 2 $]]. (Source: Finnish matriculation exam, autumn 1996)

Take a picture of your solution and return it to the submission folder.

Answer: [[$ 2|3|4 = $]] and [[$ x = $]]

Solution