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Can someone please help me I keep getting negative numbers for number 12

Can someone please help me I keep getting negative numbers for number 12-example-1

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Consider, pls, this option:
(the sum of three angles must be 180°)
(60+x)+(x+85)+55=180;
2x=-20;
x= -10.
Note, that 60+85+55=200 > 180!
60+x=50° and x+85=75°.
If to check the sum.: 75+50+55=180°
User Wilson F
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