What is the answer to this math equation. (solve for x
4x+7=35

Hello from MrBillDoesMath!

7

Discussion:

4x + 7 = 35                     =>    subtract 7 from both sides

4x + 7 - 7 = 35 - 7          =>     as 7-7 = 0

4x + 0      = 28               =>     divide both sides by 4

x = 28/4 = 7

Thank you,

MrB

< 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

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