Răspuns :
b=3a+11
c=3a
a+3a+3a+11=550
7a+11=550
7a=550-11=539
a=539:7
a=77
b=77x3+11=242
c=77x3=231
c=3a
a+3a+3a+11=550
7a+11=550
7a=550-11=539
a=539:7
a=77
b=77x3+11=242
c=77x3=231
a+b+c=550
b=a×3
b=c-11 =》c=b+11=》c=a×3+11
a+a×3+a×3+11=550
7a=550-11
a=539:7
a=77
b=77×3
b=231
c=231+11
c=242
b=a×3
b=c-11 =》c=b+11=》c=a×3+11
a+a×3+a×3+11=550
7a=550-11
a=539:7
a=77
b=77×3
b=231
c=231+11
c=242