b) notez 24/a=b pentru usurarea operatiei
3+10*[362-10*(24+b)]=623
3+10(362-240-10b)]=623
3+10(122-10b)=623
3+1220-100b=623
1223-623=100b
b=600/100 rezulta b=6 astfel a=4
Dupa acelasi model de mai sus aplicam
4+3*[60+8(b-18)]=712
4+3(60+8b-144)=712
4+180+24b-432=712
24b-248=712
24b=960 rezulta b=40 rezulta a=9