Odpowiedź :
c + 2c + 1 = 10
c + 2c = 10 - 1
3c = 9 / : 3
c = 3
d + 4d + 1 = 11
d + 4d = 11 - 1
5d = 10 / : 5
d = 2
c + 1 = 10
c + 2c = 10 - 1
3c = 9 / : 3
c = 3
d + 4d + 1 = 11
d + 4d = 11 - 1
5d = 10 / : 5
d = 2
c + 2c + 1 = 10
c + 2c = 10 - 1
3c = 9 / : 3
c = 3
d + 4d + 1 = 11
d + 4d = 11 - 1
5d = 10 / : 5
d = 2
c + 1 = 10
c + 2c = 10 - 1
3c = 9 / : 3
c = 3
d + 4d + 1 = 11
d + 4d = 11 - 1
5d = 10 / : 5
d = 2