Răspuns :
a-b=315, b=1/4a, a-1/4a=315, 3/4a=315, a=315*4/3, a=420, inlocuim in prima relatie a si il aflam pe b, apoi facem suma lor
[tex]a-b=315 \\
b= \frac{1}{4}\cdot a\Rightarrow b= \frac{a}{4}. \\
a- \frac{a}{4}=315/\cdot 4;~4a-a=1260;~3a=1260\Rightarrow~\boxed{a=420}~si~\boxed{b=105.}\\
Suma=a+b=420+105=525.[/tex]
Suma=a+b=420+105=525.[/tex]