👤
Viorica23
a fost răspuns

Fie proportia a/b=2/5.calculati:
a)a/a+b
b)a/a-b;
c)a+b/b;
d)b-a/b;
e)3a/5b;
f)3a+2b/5b;
g)5a/b;
h)a/7b;
i)a:3/b:3;
j)a:9/b;
k)a/b:3;
l)2a+3b/4b;
m)5b-3a/2a+5b;
n)4b-2a/3a+b;
o)a+7b/6b-3a.