Răspunsuri

2014-04-28T16:31:42+03:00
A=varsta fiicei
b=varsta mamei

b=20+a
b+3=3*(a+3)

b+3=3*a+9
b=3*a+6

deci 20+a=3*a+6
20=2*a+6
14=2*a

a=7 => b=27
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