Răspuns:
a) x=13×24/6(simplifici 24 si 6 prin 6)
x=13×4
x=52
c)a/2=b/5=c/8=k
a=2k=)a=2×3=)a=6
b=5k=)b=5×3=)b=15
c=8k=)c=8×3=)c=24
2k+5k+8k=45
15k=45
k=45:15
k=3
e)3a.......1251p
5a........x
x=1251×5/3
x=6255/3
x=2085
