Răspuns :
a-b=3b deci a=4b deci 4b+b=380 deci 5b=380 deci b=380/5=76 deci a=4*76=304
a+b=380
a-b=3b
a=3b+b
a=4b
4b+b=380
b=380:5
b=76
a+76=380
a=380-76
a=304
proba 304-76=3b=>228=76x3 =>228=228
a-b=3b
a=3b+b
a=4b
4b+b=380
b=380:5
b=76
a+76=380
a=380-76
a=304
proba 304-76=3b=>228=76x3 =>228=228