Răspunsuri

2014-10-14T16:38:41+03:00
  • Utilizator Brainly
2014-10-14T16:39:15+03:00
A-5b=7 /*3  inmultim relatia cu 3 => 3a-15b=21

x+3a-15b=29
x+21=29
x=29-21
x=8