Răspuns :
72:c=56:7
72:c=8
c=72:8
c=9
Proba:72:9= 8
x+859=1206
x= 1206-859
x= 347
Proba: 347+859=1206
Y-311= 999
Y=999+ 311
Y=1310
Proba: 1310-311= 999
1200-z=990
Z=1200- 990
Z = 210
Proba : 1200-210=990
72:c=8
c=72:8
c=9
Proba:72:9= 8
x+859=1206
x= 1206-859
x= 347
Proba: 347+859=1206
Y-311= 999
Y=999+ 311
Y=1310
Proba: 1310-311= 999
1200-z=990
Z=1200- 990
Z = 210
Proba : 1200-210=990