Respuesta:
42-84-128 espero te sirva
42 X 1 = 42
42 X 2 = 84
42 X 3 = 126
42 X 4 = 168
42 X 5 = 210
42 X 6 = 252
42 X 7 = 294
42 X 8 = 336
42 X 9 = 378
42 X 10 = 420
42 X 11 = 462
42 X 12 = 504
42 X 13 = 546
42 X 14 = 588
42 X 15 = 630
42 X 16 = 672
42 X 17 = 714
42 X 18 = 756
42 X 19 = 798
42 X 20 = 840
Explicación paso a paso:
