Răspuns :
5xn+245=845
5xn=845-245
5xn=600
n=600:5
n=120
V: 5x120+245=600+245=845
5xn=845-245
5xn=600
n=600:5
n=120
V: 5x120+245=600+245=845
Voi considera ''x'' drept inmultire pentru ca vad I-IV
5 x n + 245 = 845
5 x n = 845 - 245
5 x n = 600
n= 600 : 5
n = 120
5 x n + 245 = 845
5 x n = 845 - 245
5 x n = 600
n= 600 : 5
n = 120