Question

Let the function f be defined by f(x) = 12-5x

What value of a will make the equation f(a) = 6 true?


6/5


-18


-13


5/6

Answer 1

6/5

Explanation:

given that f(a) = 6

using x = a

f(x) = 12-5x

f(a) = 12 - 5a

since f(a) = 6

6 = 12 - 5 a

6 - 12 = 12 - 5a - 12

= -6 = -5a

= -6/-5 = -5a/-5

= a = 6/5

value of a is 6/5