Given:
8q + 6; q = 2
Let us first define what a variable is.
A variable is a symbol, usually a letter, standing for an unknown numerical value in an expression or equation.
From our given, we can see a letter q among the terms in the expression. Therefore, the variable in this equation is q.
Now, since we are given a value of q = 2, we will substitute this to the given expression in order to find its value
Therefore, when q = 2, the value of the given expression is 22.