Răspuns :
a+b+c=735
a=b/5=k
b=c/3
a=k
b=5k
5k=c/3
c=15k
k+5k+15k=735
21k=735
k=735:21
k=35
a=35
b=5×35
b=175
c=15×35
c=525
a=b/5=k
b=c/3
a=k
b=5k
5k=c/3
c=15k
k+5k+15k=735
21k=735
k=735:21
k=35
a=35
b=5×35
b=175
c=15×35
c=525