Question

16) w(x) = 4x + 4; Find w(x + 4)

Answer 1

$\\ \tt\hookrightarrow w(x)=4x+4=4(x+1)$

Now

$\\ \tt\hookrightarrow w(x+4)=4(x+4+1)$

$\\ \tt\hookrightarrow w(x+4)=4(x+5)$

$\\ \tt\hookrightarrow w(x+4)=4x+20$