x = 72k + 59
\Rightarrow x = 36.2k + 36 + 23
= 36(2k +1) +23 \Rightarrow chia 36 dư 23
x = 72k + 59 = 24.3k + 24.2 + 11
= 24(3k +2) + 11 \Rightarrow Chia 24 dư 11
x = 72k + 59 = 18.4k + 18.3 + 5 = 18(4k +3) +5 \Rightarrow chia 18 dư 5
x = 72k + 59 = 12.6k + 12.4 + 11
= 12(6k + 4) + 11 \Rightarrow Chia 12 dư 11