Answer:
[tex]\boxed{\text{\sf \Large 3}}[/tex]
Step-by-step explanation:
Angles in a triangle add up to 180°
[tex]180-(24x+3+25x)[/tex]
[tex]-49x+177[/tex]
Angles on a straight line add up to 180°
[tex]-49x+177+150=180[/tex]
[tex]x=3[/tex]
