Răspuns :
[tex] \frac{a+b}{2}=120=>a+b=240 \\
a=4b \\
Inlocuim: \\
4b+b=240 \\
5b=240 \\
\boxed{b= 48} \\
a=240-48 \\
\boxed{a=192}[/tex]
A + B = 120
2
A + B = 240
A = 4B
4B + B = 240
5B = 240
B = 240 : 5
B = 58
A = 4 * 58
A = 232
2
A + B = 240
A = 4B
4B + B = 240
5B = 240
B = 240 : 5
B = 58
A = 4 * 58
A = 232