Răspuns :
a + a + 2 + a + 4 + a + 6 a + 8 = 3 472 + a + 4
5 a + 20 = a + 4 + 3 472
5 a + 20 = a + 3 476
5 a - a = 3 476 - 20
4 a = 3 456
3 456 : 4 = 864 ( a )
864 + 2 = 866 b
864+4=868 c
864 + 6 = 870 d
865 + 8 = 872 e
5 a + 20 = a + 4 + 3 472
5 a + 20 = a + 3 476
5 a - a = 3 476 - 20
4 a = 3 456
3 456 : 4 = 864 ( a )
864 + 2 = 866 b
864+4=868 c
864 + 6 = 870 d
865 + 8 = 872 e