Răspuns :
a+b=1904
a:b=7=> a=b*7
b*7+b=1904=>8*b=1904=>b=1904:8=> b=238
a+238=1904=>a=1904-238=>a=1666
verificare: 1666+238=1904
1904=1904 (a)
1666:238=7
7=7 (a)
a:b=7=> a=b*7
b*7+b=1904=>8*b=1904=>b=1904:8=> b=238
a+238=1904=>a=1904-238=>a=1666
verificare: 1666+238=1904
1904=1904 (a)
1666:238=7
7=7 (a)