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2014-03-10T15:44:12+02:00
(a+b)/2=7.7
a+b=15.4
a=8.1
8.1+b=15.4
b=15.4-8.1
b=7.3
2014-03-10T15:46:03+02:00
Fie a nr cautat a+b/2=7,7=> a+8,1/2=7,7=> a+8,1= 15,4=> a=7,3 /= fractie