Răspuns :
a) a : 7 = 10 rest 2
a = 10 x 7 +2
a = 70 +2
a = 72.
b) a : 8 = 7 rest 2
a = 7 x 8 + 2
a = 56 +2
a = 58.
c) 23 : a = 7 rest 2
a = (23 - 2) : 7
a = 21 : 7
a = 3.
a = 10 x 7 +2
a = 70 +2
a = 72.
b) a : 8 = 7 rest 2
a = 7 x 8 + 2
a = 56 +2
a = 58.
c) 23 : a = 7 rest 2
a = (23 - 2) : 7
a = 21 : 7
a = 3.