1 a=7*11+4=81
a=3*22+1=67
a=5*11+2=57
x=?????
x=4 verificare=4*1+2=6
x=3 verificare 3*3+1=10
2 a) 64/3=21 rest 1
proba=21*3+1=64
98/3=32 rest 2
proba=32*3+2=98
25/3=8 rest 1
proba=8*3+1=25
49/4=12 rest 1
proba=12*4+1=49
b) 49/2=24 rest 1
proba= 24*2+1=49
57/5=11 rest 2
proba=11*5+2=57
35/3=11 rest 2
proba=11*3+2=35
69/6=11 rest 3
proba=11*6+3=69
c) 85/4=21 rest 1
proba=21*4+1=85
94/3=31 rest 1
proba=31*3+1=94
27/3=9
proba=9*3=27
47/4=11 rest 3
proba=11*4+3=47