Question

Let f be a function defined by f(x)=(x/5)-(1/5). Determine the value of x for which f(x)= -4

Answer 1

when f(x) = -4
-4 = x/5 - 1/5
-4 + 1/5 = x/5
-20/5 + 1/5 = x/5
-19/5 = x/5
x= -19

Answer 2

thank you very much.