Răspunsuri

2014-05-12T14:50:46+03:00
A+b+c=180
a=1k
b=3k
c=5k

1k+3k+5k=180
9k=180
k=180:9
k=20

a=20 grade

b=20*3
b=60 grade

c=5*20
c=100 grade