624 is how much is deducted from his pay every month
For this case we have that by definition, a linear equation is of the form:

The variable (s) involved in the equation always have exponent 1.
Some examples of linear equations are:

Answer:
In a linear equation the variables have exponent 1.

n = 6
6 x 5 = 30
hope this helped, please mark brainliest. :)
It is d i would include a visual picture but i’m lazy lol