Răspuns :
Cu cati ani in urma tata avea de 3 ori varsta lui Vlad ?
(12-x)*3= 30-x
36-3x=30-x I+3x
36=30+2x
2x=6
x=3
Sper ca te-am ajutat!!!
..................................................................................................................................
![Vezi imaginea Stefanbosss36](https://ro-static.z-dn.net/files/d88/73b842b70f7cd899a5189e3de680e676.jpg)