Question

if x=4x+5 what is the value of f(-3)

Answer 1

You plug in -3 for x for 4(-3)+5 =-7

Answer 2

Step-by-step explanation:

$f(x) = 4x + 5 \\ f( - 3) = 4 \times( - 3 )+ 5 \\ f( - 3) = - 12 + 5 \\ f( - 3) = - 7$