The answer of this question is 13°
Step-by-step explanation:
(9x-17)+(4x+28)=180° ( Being cointerior angle of parallel line)
or, 9x-17+4x+28=180°
or, 13x+11=180°
or, 13x=180°-11
or, x= 169°÷13
: x=13° answer
