Răspuns:
5xn+245=845
5xn=845-245
5xn=600
n=600:5=120
54:n+67x5=334
54:n+335=334
54:n=334-335
54:n=-1
n=-1x54
n=-54
(la acesta nu sunt sigur)
n:3x8=616
n:3=616:8
n:3=77
n=77x3
n=231
894-n:4=883
894-n=883x4
894-n=3.532
n=3.532+894
n=4426
Sper ca te am ajuatat!
