Răspunsuri

2014-10-22T16:04:12+03:00
9+2(14-y)=159+28-2y=15
37-2y=15
2y=37-15
2y=22
y=22:2
y=11

2014-10-22T16:06:20+03:00
9+2(14-y)=15
2(14-y)=15-9
2(14-y)=6
acum desfacem paranteza adica 2 x 14 si 2 x y
28-2y=6
2y= +6-28
2y=-24
2 x y = - 24
y = (- 24 ):(+ 2)
y= - 12