1. 3x + 5 = 7
2. 3 - 5x = -9 + x
For problem number 1 I just need to know what X is
For problem 2 also need to figure out what X is.
Thanks for the help people ☺☺

450 is the final answer! : )

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐