Answer:
(x + 39) or x = -39
Step-by-step explanation:
Set f(x) to 0
0 = 5x + 195
5x = -195
x = -39
yes,no, no, yes
If you want to know what b is then it is 16
38 + b = 54
54- 38 = 16
38 + 16= 54