Respuesta :

f(x) = x - 7
x = -2

f(-2) = -2 - 7
f(-2) = -9
Step 1: Substitute -2 in for x in the equation.
** Remember the f(x) is y, not x

f(x) = -2 - 7

Step 2: Solve the math problem that you are left with.
f(x) = -9
__________________________________________________________

f(x) = -9 is your final.