Răspuns :
scaune - s
banci - b
s+b = 81
b-29 = s
=> b-29 + b = 81 | + 28
2b= 110 |:2
b= 55 banci
=> s=81-55= 26 scaune
banci - b
s+b = 81
b-29 = s
=> b-29 + b = 81 | + 28
2b= 110 |:2
b= 55 banci
=> s=81-55= 26 scaune