Answer :

apologiabiology
notice it is on a straight line so the missing intereior angle is 180-147=33
so all angles add up to 180
85+33+x=180
118+x=180
subtract 118 from both sides
x=62
Benheb18
x equals 62 because you take 147 and subtract it from 180 and that gives you 33.
then you add 33 and 85 together to give you 118.  Then you subtract 118 from 180 and that gives you 62.
x=62

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