We know that our function is [tex]f(x)=-5x+6[/tex]; the only thing we need to find [tex]f(3n-5)[/tex] is replace [tex]x[/tex] with [tex](3n-5)[/tex] in our original function:
[tex]f(x)=-5x+6[/tex]
[tex]f(3n-5)=-5(3n-5)+6[/tex]
Now, lets simplify our function:
[tex]f(3n-5)=-15n+25+6[/tex]
[tex]f(3n-5)=-15n+31[/tex]
After simplify our function, we can conclude that [tex]f(3n-5)=-15n+31[/tex]
