Question

Let f(x) = -4x + 7 and g(x) = 10x - 6. Find f(g(x))

Answer 1

$f(x) = -4x + 7$
$g(x) = 10x - 6$

$f(g(x))$
$= f(10x - 6)$
$= -4(10x - 6) + 7$
$= -40x + 24 + 7$
$= 31-40x$

Answer 2

$f(g(x))=-4(10x-6)+7\\ f(g(x))=-40x+24+7\\ f(g(x))=-40x+31$