dacă 2a+b/3a+2b = 2/3 atunci valoarea nr b este

[tex]\frac{2a+b}{3a+2b}=\frac{2}{3}<=>3(2a+b)=2(3a+2b)<=>6a+3b=6a+4b<=>6a-6a=4b-3b<=>0=b=>b=0[/tex]