Question

Evolution the expression when a=–3 and x=3 5a–x

Answer 1

Answer:

-18

Step-by-step explanation:

Step 1:  Substitute -3 for a and 3 for x

5a - x

5(-3) - (3)

-15 - 3

-18

Answer:  -18

Answer 2

It's a good idea to get into the habit of using parentheses when substituting numbers in for variables.

Since a = -3 and x = 3, 5a - x is 5(-3) - (3).

5(-3) is -15 and we have (-15) - 3 which simplifies to -18.