Răspuns :
a-b=144
a:b=7r18
a=7b+18
7b+18-b=144
6b=144-18
b=126:6=21
a=144+21=165
a+b=21+165=186
a:b=7r18
a=7b+18
7b+18-b=144
6b=144-18
b=126:6=21
a=144+21=165
a+b=21+165=186
a-b=144
a:b=7 rest 18
a=7b+18
7b+18-b=144
6b+18=144
6b=144-18=126
b=126:6=21
a=7b+18=7x21+18=147+18=165
165-21=144(verificare)
165+21=186
a:b=7 rest 18
a=7b+18
7b+18-b=144
6b+18=144
6b=144-18=126
b=126:6=21
a=7b+18=7x21+18=147+18=165
165-21=144(verificare)
165+21=186