Răspuns :
a+3270=6500
a=6500-3270
a=3230
a+3270=9715
a=9715-3270
a=6445
a+3270=7000
a=7000-3270
a=3730
a+3270=5100
a=5100-3270
a=4773
a=6500-3270
a=3230
a+3270=9715
a=9715-3270
a=6445
a+3270=7000
a=7000-3270
a=3730
a+3270=5100
a=5100-3270
a=4773