Question

F(x)=2x-5 and g(x)=x+3 find gf(3)

Answer 1

$2x - 5 \\ if \: \: x \: \: = \: \: 3 \: \: then \\ 2 \times 3 - 5 \\ 6 - 5 \\ = > 1$

$\\ \\ \\ \\ x + 3 \\ if \: \: x \: \: = \: \: 3 \: \: then \: \\ 3 + 3 \\ = > 6$