What is the input value if f(x)=10 and the function is f(x)= ¼x-8

Question

Find the input value

Answer 1

If f(x) = 10, and the function is f(x)=1/4x-8 then:

 

1/4 x -8 = 10

1/4 x = 10+8=18

1/4 x = 18

x = 18*4 = 72

 

So, since x is the input value, then the input value for f(x) = 10 is x=72