Răspuns :
Răspuns:
a-b=87
a:b=5,r.7 => a=5b+7
Inlocuim:
5b+7-b=87
4b+7=87
4b=87-7=80
b=80:4
b=20
a=87-20
a=67
A-b=87
A-b=5r7
A=5b+7
5b+7-b=87
4b+7=87
4b=87-7
4b=80
b=80:4
b=20
a=5x20+7
a=107
A-b=5r7
A=5b+7
5b+7-b=87
4b+7=87
4b=87-7
4b=80
b=80:4
b=20
a=5x20+7
a=107