Răspuns:
-30; -45.
Explicație pas cu pas:
[tex]\frac{a}{b} =\frac{2}{3},~deci~a=\frac{2b}{3} .~inlocuim~in~a-b=15\\ \frac{2b}{3}-b=15 |*3, ~\frac{2b*3}{3}-3*b= 15*3,~2b-3b=45,~deci~-b=45,~deci~b=-45.\\Atunci~a=\frac{2*b}{3} =\frac{2*(-45)}{3} =-30.\\Verificare:~\frac{a}{b}= \frac{-30}{-45}=\frac{-15*2}{-15*3} =\frac{2}{3}\\a-b=(-30)-(-45)=-30+45=15[/tex]
