Răspunsuri

2014-10-18T16:45:14+03:00
B-a=10 ,  a+b=72  ,  a+(a+10)=72  , 2a+10=72 ,  2a=72-10, 2a=62, a=62:2 =>a=31
a+b=72 =>b=72-31 =>b=41
b+c=90 =>c=90-41 =>c=49