👤

36-24:6-b+49:7=29
b=?


Răspuns :

24:6=4
49:7=7
36-4-b+7=29
36-4=32
32-b+7=29 
29-7=22 (facem operatia inversa in loc de 29+7)
32-b=22
b=32-22
b=10

Verificare=36-24:6-10+49:7=29
b=36-24 b=12 b=12:6 b=2 b=2+49:7 b=2+7 b=9