Question Number 220873 by Spillover last updated on 20/May/25
Answered by mr W last updated on 20/May/25
$$\mathrm{18}!×\mathrm{19}×\mathrm{18}=\mathrm{18}×\mathrm{19}! \\ $$$${or} \\ $$$$\mathrm{20}!−\mathrm{2}×\mathrm{19}!=\mathrm{18}×\mathrm{19}! \\ $$
Commented by Spillover last updated on 21/May/25
$${correct} \\ $$