Answer:
-30
Step-by-step explanation:
We are going to substitute c as -3 in all the places it is shown:
(x is just a variable I used to represent the answer)
5c + 4c + 1c = x
5(-3) + 4(-3) + 1(-3) = x
(-15) + (-12) + (-3) = x
-30 = x
The answer is -30
