1. x-primu numar
y-al doilea
x=3y
y+x=624 => y+3y=624 => 4y=624=156
y=156:4=39
x=624-39=585
2. x:y=4 => x=4y
x+y=600 => 5x=600 => x=600:5=120
y=600-150=450
3. a-prima
b-a doua
a+b=544
b=3a
4a=544
a=544:4=136
b=544-136=408
