Răspuns :
[tex]a+b+c=92 \\ a+b=55 \\ b+c=43 \\ \\ 55+c=92 \\ c=92-55 \\ c=37 \\ \\ a+43=92 \\ a=92-43 \\ a=49 \\ \\ b+37=43 \\ b=43-37 \\ b=6[/tex]
a+b+c=92
a+b=55
c=92-55
c=37
b+c=43
a=92-43
a=49
a+b=55
49+b=55
b=55-49
b=6
49+6+37=92
a+b=55
c=92-55
c=37
b+c=43
a=92-43
a=49
a+b=55
49+b=55
b=55-49
b=6
49+6+37=92