Question

aflați x, y, z dacă x/3=y/6,y/2=5z și x+2y+z=18​

Answer 1

Răspuns:

x/3 = y/6 = k

x=3k

y=6k

y/2 = 5z = k'

y=2k'=6k =>k'=3k

z=k'/5=3k/5

3k + 12k + 3k/5 = 18

15k+60k+3k=90

78k=90

k=90/78=45/39

x=45/13

y=90/13

z=9/13