Răspuns :
a+b= 1000;
a/b= 3/5;
a= 3b/5;
3b+ 5b =5000;
8b=5000;
b=625;
a= 1000-625=375;
a+b=1000
a/b=3/5
a=3b/5
3b/5+b=1000 aducem la acelasi numitor 5 => 3b+5b=5x1000
8b=5000
b=5000:8
b=625
a=1000-625
a=375
a/b=3/5
a=3b/5
3b/5+b=1000 aducem la acelasi numitor 5 => 3b+5b=5x1000
8b=5000
b=5000:8
b=625
a=1000-625
a=375