[tex]21.161(17x+2)=24.8[/tex]
Distribute the [tex]21.161[/tex]
[tex]359.737x+42.322=24.8[/tex]
Subtract [tex]42.322[/tex] from both sides
[tex]359.737x=-17.522[/tex]
Divide [tex]359.737[/tex] on both sides
[tex]x=-0.048708[/tex]
Therefore -0.048708 is your answer.