Răspunsuri

2014-03-15T11:20:33+02:00
X*5=y*6=z*15=k
3x-2y-z=12
x*5=k => x=k/5 = 12
y*6=k => y=k/6 = 10
z*15=k => z=k/15 = 4

3k/5 - 2k/6 - k/15 = 12

18k- 10k - 2k / 30 = 12

6k/30=12

k=360/6 =  60
2014-03-15T11:35:08+02:00