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Davidbota
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Ajutorrrrrrrrrrrrrrrrrrrrrrrrrrr class=

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Răspuns:

suma unghiurilor exterioare =360 ;   2x+18+4x-15+3x+24=360 ;                                 9x=360-18+15-24 ;   9x=333 ;   x=333/9=37 ;  

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