Răspunsuri

  • Utilizator Brainly
2014-05-12T21:18:35+03:00
6,5y-4y=15+3,4
2,5y=4,9
y=4,9/1,5=1,96
6z+21+4=5z-15
z=-21-15
z=36
1 1 1
Cel mai inteligent răspuns!
2014-05-12T21:18:38+03:00
A) 6,5y-15=4y+3,4
6,5y-4y=15+3,4
2,5y=18,4
y=18,4:2,5 
y=7,36

b)
3(2z+7)+4=5(z-3)
6z+21+4=5z-15
6z-5z=25-15
z=10
2 3 2