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a+2b+3c=98 si 3a+2b+c=94

Răspuns :

a+2b+3c=98\+3a+2b+c=94=> 4a+4b+4c=192\:4=> a+b+c=48
a+2b+3c=98+3a+2b+c=94\4a+4b+4c=192
sper ca te-am ajutat