Respuesta:
A+∅+80=180
A+∅=100
(2A-180)+x+(2∅-180)=180
2A-180+x+2∅-180=180
2A+2∅+x-360=180
2(A+∅)+x=540
2(A+∅)=540-x
A+∅=540-x/2
540-x/2=100
540-x=200
340=x
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Respuesta:
A+∅+80=180
A+∅=100
(2A-180)+x+(2∅-180)=180
2A-180+x+2∅-180=180
2A+2∅+x-360=180
2(A+∅)+x=540
2(A+∅)=540-x
A+∅=540-x/2
540-x/2=100
540-x=200
340=x