Question

f(x)=3x-9, determine: f(x)=6x-22

Answer 1

F(x)=f(x)
3x-9=6x-22
-3x=-13
x=-13/-3
x=13/3

Answer 2

{3x=f(x)+9,6x=f(x)+22}
{f(x)=3(x-3);f(x)=2(3x-11)}