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determinati a,b,c stiind ca a+b=84, b+c=64,a+c=34

Răspuns :

A+B=84/ a=84-B. / 84-B +c =34. / B-c=50. / B=60+c / 60+c+c=64. / 2c =4 / c=2/ B=60+2=62. / a=84-62=22