Question

As dori problema daca se poate fara greseli. Multumesc!
Dau coroana​

Answer 1

Răspuns:

3(a+b+c+d)=480 =>a+b+c+d=160

3a=6b=c+10=d-20=k

a=k/3

b=k/6

c=k-10

d=k+20

k/3 + k/6 + k - 10 + k + 20 = 160

2k+k+6k-60+6k+120=960

15k+60=960

15k=900

k=60

a=60/3=20

b=60/6=10

c=60-10=50

d=60+20=80