Răspuns :
[tex]A|^{\underline{~~~~~~~~~~~~~~~~~~~~~~~~}}|^{\underline{~~~~~~~~~~~~~~~~~~~~~~~~~}}| \\
B|^{\underline{~~~~~~~~~~~~~~~~~~}}|^{\underline{~~4~~}}| \\
A+B=23 \\
2*(B+4)=A \Longrightarrow A=2B+8 \\
Inlocuim: \\
2B+8+B=23 \\
3B=23-8 \\
3B=15 \\
\underline{B=5(baieti)} \\
A=2*5+8 \\
A=10+8 \\
\underline{A=18(fete)}[/tex]