Răspunsuri

2014-10-19T14:16:46+03:00
Peste x ani:
 39+ x = 3(7+x)
 x=9
mama are 39+9=48 ani
maria are 7+9=16 ani
2014-10-19T14:27:43+03:00
7*3=21  39+21=60=)mama are 60
39-7=32 60-32=28=)varsta Mariei =28

Sper ca te-am ajutat!!!!
:-)