Question

If f(x) = -3x + 6 and f(x)=18
then what is the value of x?

Answer 1

-4=x

Explanation:

f(x) = -3x + 6

Let f(x) = 18

18 = -3x+6

Subtract 6 from each side

18-6 = -3x+6-6

12 = -3x

Divide each side by -3

12/-3 = -3x/-3

-4=x